I'm a one-bag traveler. This only really matters when I travel, which is four or five times most years. On a daily basis, though, having only one bag is the absolute essence of minimalism. A single daily bag becomes a reliable tool for consolidating the gear and information that are most important in daily life. A single bag is vital to the holy grail that is Being Organized.
This doesn't necessarily mean that I OWN only one bag. It means all my DAILY STUFF is in one bag.
I currently have one work bag, two daytime purses, three evening purses, and a beach tote. This is because I haven't gotten around to getting rid of the two purses that are getting shabby after ten or so years. To me, having extra bags leads to guaranteed confusion, lost objects, and late departures. No bag ever made is pretty enough, or even useful enough, to make up for unnecessary hassle and irritation.
For local trips, I often just put my wallet and keys in my pocket, like a man, if I actually have pockets, because women's fashion is a conspiracy.
Ideally, my purse and work bag would be one and the same. In practice, I need a larger bag two days a week, and I don't like lugging it around more than I must. It's like when the rocket boosters separate from the space shuttle.
Purse: Wallet, phone, keys. Pen. Sunglasses. Lip balm. Tissues. Hair tie. Coin purse.
Work bag: Backup battery, adapters, and headphones. I carry sunblock and deodorant because of the climate where I live, and a small vial of Aleve because I'm superstitious. Mini emergency toothbrush, a wet wipe, and a stain treatment pen. Protein bar, and emergency sandwich if I'm flying. Folding grocery bag. Sweater. This is the maximum amount of paranoia gear I carry in my work bag, in addition to my tablet and phone. The most important object in this cavernously large bag is the EXTRA SPACE it provides for me to run errands.
I timed myself transferring items between bags. It took 57.71 seconds.
My husband commutes via bus, and he carries a backpack. It has his laptop and charger, glasses case, sunglasses, wallet, keys, phone, backup batteries and adaptor, headphones, and pen. Today, it also had a notebook, textbooks, and calculator because he's studying for a new professional certification. The most important feature of his backpack is the EXTRA SPACE it has for his lunch or a stop at the grocery store on the way home. I just asked him, "You don't have any receipts or anything in there?" He shook his head no, casually, like if I asked him if he ever debated what color of socks to wear with his outfit.
Parents whose kids are still at home will probably be thinking, "Easy for you, but we have kids." I know this because parents use this reply in every possible situation. The truth is that people who travel in packs have even more reason to organize and streamline their daily stuff. If you don't like dealing with tears in the morning, assuredly, your kids don't either. Checking kids' school bags and resupplying diaper bags in the evening prevents a lot of frustration before it has a chance to derail your family life.
Now that we've done the exposition, the key to Single Bag Theory is the strategic loading and unloading of the bag. The bag is Command Central. Since I don't need my wallet, keys, or sunglasses inside my home, they just stay in the bag. I never have to look for them. I know where the bag is because I always put it in the same spot when I get home. If I need to take something somewhere, like outgoing mail, I put it directly into the bag. This way I don't need a container or flat surface or special furniture; our apartment is so tiny that we don't have a foyer or hallway or mudroom or any of that. If we didn't have a system for our daily bags, then we would have a nonfunctional kitchen with counters covered in junk. That's just an objective fact.
Unloading the bag means making decisions. What am I carrying at the end of the day that is not strictly necessary to my next trip out the front door? Generally it is groceries or sundries I bought, receipts, mail, extra paper napkins, and the occasional piece of trash or recycling. Most of us carry receipts more out of habit or concern about identity theft than because we actually DO anything with the receipts. I try to avoid having receipts printed out at the check stand whenever possible. I do categorize my expenses in my finance app, but I only save the receipts with split expenses. This means that if I went to a restaurant, clothing store, bookstore, or other place with only one category of expense, I don't need the receipt for my purposes. If it's something expensive like electronics, I'll save it until I'm sure the item works properly. Most of our mail is junk mail, and almost everything that's left is outer and inner envelopes, brochures, and other useless inserts. We pay our bills electronically. Process and shred or recycle. Most of my trash sorting happens while I'm waiting at bus stops. When I check the contents of my bag at the end of every day, it only takes a quick glance and a few seconds to pull out anything weird or silly. I'm weird and silly enough without giving myself chiropractic problems lugging extra junk on my neck.
My smartphone takes the place of many of the items I used to carry. I no longer need a bulky paper day planner or address book or notebook or calculator. I no longer have tons of scraps of notes, phone numbers with no name on them, shopping lists, directions, or map printouts. I've developed the habit of setting alarms and time- and location-based reminders, because otherwise I know the fallibility of my ADHD mind. I need to be wondering about stuff like whether crows can be trained to pick up litter or whether there will ever be a wall-climbing scrubbing robot, not whether I've forgotten to order parrot kibble or where I put my keys. That's the point of all this, the point of Being Organized. We have more important things to do and more interesting things to think about than our daily stuff.
Having only a single bag has a magical way of making us more organized. Suddenly we know where our keys, phone, and glasses are. Suddenly we know where to look for our little scraps of notes. We start to be less late, and finally on time for things, because we can just sling the bag over one shoulder and go straight out the door. All the little rays of wandering attention we have aimed all over the place start to merge into a thick beam of focus. Having one bag can help us both look better and feel smarter, and what a magical bag that is!
I've been working with chronic disorganization, squalor, and hoarding for over 20 years. I'm also a marathon runner who was diagnosed with fibromyalgia and thyroid disease 17 years ago.