One of the best things I've bought has been my water shoes. No, not the slip on kind you see people wearing at public pools.
Rugged water shoes that you can hike in as well as hit the water in. http://www.basspro.com/World-Wide-Sportsman-Addy-Water-Shoes-for-Ladies--Gray/Pink/product/10211609/-1751822?cmCat=CROSSSELL_PRODUCT These work perfectly! I actually wear them daily now. I've "creek mucked" in them, crossed muddy hiking paths as well as worn them canoeing. No more slipping in the canoe for me!
We're headed out today to purchase a pair for my 13 year old daughter. With our adventures coming up she needs a new pair. We may have to hit the creek some time today to test them!