Any environment you're very familiar with, periodically scan through what you do there and rethink it.
I replaced a small water bottle in the gym with a 1.5 liter bottle.
It used to be, I'd have to refill my water bottle multiple times during a workout.
Now, I can slam a big water beforehand, and get through the whole workout with just one.
It sounds small -- it is small -- but it radically changes the experience to one that's more conducive to flow, and it eliminates walking over to the water area (it's a bit of a distance) and sometimes getting stuck waiting by someone.
Scan your environment. Your office, your desk, your gym routine, how your briefcase is packed, how your kitchen and refrigerator are laid out, your car, and so on.
Having a spare change of clothes at the office and some toiletries was awesome for me when I stumbled on it -- it meant I could sleep on my couch and my staff wouldn't know the next day.
If you take vitamins but sometimes forget to take them, having a set both placed conspicuously in your home and another in your briefcase could be a boon.
Buy lots of socks. Running out of socks is a nightmare.
And things in that vein. Rethink the environment. It could be a lot more pleasant and efficient for you, certainly.