I run a pocket query for the area I am planning on placing in, load it into my gps, and head out into the field. When I find a good spot, I check the gps for the nearest caches, if there is nothing too close, I hide my container and mark it. I always double check online before I submit, using methods already mentioned. As stated earlier this method won't help with multi's and puzzles either. The more caches you do in your area the easier you will be able to avoid those.