Wear light, moisture-wicking, synthetic (not cotton) socks, after you run, change out of your soggy socks and shoes and slip into dry after-sport shoes before you go for coffee or run errands.
Get rid of odors. Dealing with odor is a problem many people face, since feet produce more sweat than the rest of the body and tend to harbor bacteria that creates a smell. If your foot odor has gotten out of hand, there are measures you can take to make them smell better right away.
Rest your ankle. Skip any activities that cause pain or limping.
If you have a severe sprain, then you should walk with crutches or a cane so that you don't cause further injury.
Vary your exercise routine. If you're used to running on a treadmill, try swimming or using a rowing machine instead. Just make sure that you don't completely avoid physical activity. You still need to keep your other muscles conditioned.