Sometimes when editing I think I know the problem with a scene. It's the pov, or the plot, or the underpainting. And I jump in to fix it, rewriting here, tweaking there, the whole while thinking it will be brilliant, only to find I still didn't fix the problem. I need to stop jumping to conclusions, sit back and think a little. If I do I find things I hadn't thought of before and the scene shapes up nicely. Each day when I'm done with my editing I try to read over the next scene to get an idea of what it needs. Then I can let it percolate in the back of my mind until my next writing session.
How about you? Do you jump in, think exhaustively, or a combination of the two?