The Port Thane, because you just shouldn't carry that much.
Prereqs:
none
Disclaimer:
Characters can be killed, so... be careful.
Description:
So, basically at some point you're going to need to off-load the crap that you pick up while you're in the cave, and you may not wish to sell it all. Enter the Port Thane. Port thanes are a great way of storing all and categorizing all of your gear. These are thanes you build to have lots of portage. Typically mass numbers is nearly as effective as a big thane, so there's seldom a reason to bother with building a single large port thane. I personally build 3-5 small thanes with about 30 port each. It's pretty easy to obtain, and allows you to put certain types of items on certain thanes.
Drawbacks:
Obviously the biggest issue here is that if you awaken a port thane it can be killed, and if it's killed then all your gear's on the ground.
Related Tactics:
Port Room