Totally good ideas! those are things that I like to do too.
My list is:
lip balm, travel size mouthwash, small tubes of toothpaste, Kleenex, moist towelettes,q-tips (don't want dirty ears after all

) little powdered packages for flavoring water, I reuse my plastic water bottle, until it is time to recycle it, phone charger, sunglasses, toothpicks, travel size sewing kit,bandages, first aid ointment, such as neosporin, anti-itch creams, (in case you are snacked upon by an insect, etc.) aspirin, sunscreen, those bath poofy puffs, and then there are all of my hair accessories, which is a whole nother topic

pretty much every thing that I like to collect is in a most convenient travel size form.
My toiletries are regular size, with exception of the mouth rinse.
and I too, have been storing them away in a plastic container, I like the clear type, that way it is very easy to see how your collection is coming.

What I am still looking for are those little plastic cups that are collapsible. They are a perfect travel size, and fit so nicely into your purse, or bag.
I just cannot seem to find them, so far.