Originally Posted by Double
There are three main breakers that run petty much the entire house and I'd like seperate a few out (like the guest room/garage/office/dining room that are on one 20a breaker).
You can get a toner/tracer and spend a few hours poking around.
The best bet would be to think of what may have been needed years ago that isn't needed anymore and try to find the other end of that.
The most common of these being window air conditioners (or baseboard heaters) that got eliminated when the central system was upgraded.