I have a bunch of air-travel survival rules, one of which is, never check luggage. Not only does it add time to your trip (and, nowadays, fees), it adds the risk of having your luggage disappear. And sometimes that's not even the airline's fault: I am in Seattle today thanks to a last-minute phone call that I got while waiting for my flight home to JFK. If I had checked luggage it would probably still be circling the carousel in Queens, and I'd be trying to find a clothing store open at 8am instead of drinking coffee and puttering online.
Anyway, the moronic rules banning liquids in carry-on luggage have made this more difficult. I could never decide whether to put little bottles in a plastic bag, or just buy the necessaries when I got where I was going. The former is wasteful and stupid and is one more thing to worry about at the security line and I am all about getting through that nonsense as quickly as possible. The latter saves time at the airport but adds it later on, and it's also expensive and wasteful.
I have finally found the right answer: no liquid toiletries. Basically you have to go back to the early part of the last century for the answers: tooth powder and shaving soap. I made my own tooth powder using this recipe (I left out the lemon peel since I was in a hurry and it's just for flavoring). You can order shaving soap (and the other accoutrements) from a few places online, and it does make for a more pleasant (and more environmental) experience than canned shaving cream.
So with those two additions to my travel kit, I have been able to go straight through security without having to open any bags or take anything out that could get left behind or forgotten, and go straight from the plane to a cab or rental car without riding the luggage carousel.