Here's another great technique, if you're carrying too much stuff and find yourself encumbered. You know how you can search downed enemies' corpses for the goods they carry? Well, you can also place your own goods onto the corpse. Since corpses tend to stay around after they die seemingly indefinitely (or, at least, for a good long time), you can drop presently unneeded items onto the corpse of a foe you've slain, and then go back at a later date to get your stuff back. This is a great way to never become encumbered.