This stage of the game is when savvy has to come into play. You will develop it more and more as you continue playing. Start looking at what seams a little out of place or re-arranged.
It may not real noticable to the casual passer-by, but the cacher that is on a "mission' that is there to intentionally look for something hidden, will pick this slight detail up.
i.e. What little stack of wood or cluster of rocks doesn't look like it would happen naturally. Don't forget that at some point, the cache may be hidden up off the ground.
Fear not. You'll start seeing these little clues. Say to yourself, "where would I hide something" when you get in close to your coordinates. Some caches may be micros. All the harder to locate.
Hope this helps a little