I sometimes duplicate lip items, if they are drugstore brands. But 99% of my makeup are prestige brands, so it's too expensive to duplicate. Plus, I stick with the life cycle recommendations, discarding when they're past time.
The only thing I retouch during the day is lips, anyway. I keep all my lip things in a bin by the door, and put the one I'm wearing that day into my purse. I take it out when I get home.
Before I had a home gym, I did keep a small makeup bag with some drugstore items in my gym bag, as well as a bag of toiletries for showering.
Deborah and others -- my favorite organizer is a PurseN. I was able to find one in person to check it out, and have been using it for several years now. Love it! http://pursen.net/collections/.....rts-medium