Toiletries

I believe we have all showered frequently enough that I do not need to make any suggestions here, except that you should--

Get a microtowel. This is by far the easiest and cheapest way to save weight and space. Microtowels are made from super-absorbent polyester, wring out 90% dry, and dry quickly. They weigh practically nothing, take up no space, and cost under $20. By the way, you don't really need a full-size one; I got by with a washcloth size and it was okay.

Remember that we talked about washing clothes in the sink. I used CampSuds, which is super-concentrated stuff that requires several drops per item. It is also bio-degradable. They make a citronella-infused one that is also a bug repellent. If all your clothes have been washed in bug-repelling citronella, you might not need to apply bug spray as often (if you're going somewhere where it's needed).

Ultralight hikers tend to shave off some weight here too; you can put medication in plastic bags instead of bottles, use a comb instead of a hairbrush, or skip it altogether, and so on. Everything adds up.

One last thing--if you only budget for travel-sized items, you will have trouble on the road as it is hard to find these sizes in ordinary stores, and you will probably end up buying larger ones anyway. Just make sure to budget the extra room. And by the way, the stupid airlines have banned bottles above 100 mL (3 oz). This is a stupid, stupid, stupid rule, but just remember to have small bottles. To circumvent the rule completely, you can buy lots and lots of small bottles. It doesn't matter how much liquid you carry, as long as they are in small bottles (does this make sense to anyone? god I hate airlines).