What can the average consumer do to improve the value of the US dollar?

Wait six months to buy the things you want vs what you need.
The shiny new cell phone? Give it 6 months and see what it costs.
A brand new car? Buy one coming off a one year lease.
They will work just as well 6 months later.
"Everything is worth what the purchaser will pay for it" - Publius Syrius (One of my favorite philosophers)
Once you subscribe to the notion that inflated prices are OK to pay, you become part of the problem and prop up the inflated prices.
See also "debt is the slavery of the free".

https://en.wikiquote.org/wiki/Publilius_Syrus

If it's for the individual look for ways to add to the spent dollars value. Use coupons, discount programs, reward programs, and other deals. Also, buy generic and store brands so you can "stretch" your dollars. If this is a macro question involving currency, invest wisely and make your money work for you. Ben Franklin once said the best invention was compounded interest. Last, it's hard if not impossible to time any market. The international currency market is fickle and react to a bunch of unrelated variable.

SGT (Join to see) Good question. There are many ways. Stop spending money on items that you do not absolutely need, and save/invest the money instead. Be a smart consumer. Go out to eat no more than once a week at lunch when it is cheaper. Do not buy desert or an appetizer unless you have a coupon. Use coupons to stretch your dollar. Keep track of where every dollar goes and what you bought and compare it to the money coming in each month. Prepare a budget and stick to it. Do something long enough and it becomes a habit. Being a frugal saver and investor are not dirt words. Do research on your investments to make sure that they are right for you. Planning and research will take you a long ways.