Who are you and what have you done to Mem and why am I learning of it from an LJ comm?

Anyway. What you need is xkit. I changed my browser to be able to use it. It really makes tumblring easier. There are a lot of extensions. You want blacklist, and probably many others (classic search and tags on sidebar make using tags MUCH easier, if your internet would allow it).

And you want to follow askjxc. Trust me. They don't post often, but you don't want to miss it.