The best projects I've worked on have all had time to rise... or set, or digest, or sit, or brew, or whatever you call it. Once the initial creative task is done, you need to let the subconscious take over, or just give yourself time so you can freshen your eyes and detect your mistakes later.
Some might call this downstream thinking, which has a negative connotation. However, I think the best downstream planning realizes that you don't know exactly where a river will take you, and you better plan some time to stop paddling and puzzle over the delta.
Besides, every plan I've ever worked with has crumbled upon contact with the enemy.
So let that yeast do its work, baby. Let your projects - at work, at school, in your creative life - rise.