Have a little wristlet or pouch you keep your essentials in (whatever they may be). Toss it from your purse to you backpack, to a carry on bag if you're traveling, or just on it's own for an evening out.
studying incentive, when you reach a gummybear, you get to eat it. I've been studying wrong my whole life. -this might work as a reading incentive for the kids too (especially for those tough chapter books!