[Forrest]

All I do is check Matching known ad sizes, From third-party sites and From blocked URLs. This gets the vast majority of the ads. It's super quick, and I really don't think it gets much easier.

If I find something that should be blocked but isn't, I right click on it and chose filter. If I find something that shouldn't be blocked but is, I click on it.

Seems pretty simple to me.