I think that it's important, as Goags (Jerry) said, to look at it once again later on.
While playing with them and moving them around, sometimes my eyes just lock onto something as being right and I then get the rest off with the one that I've decided is correct. Sometimes, I just don't get it right that first time through.
But by setting it aside, and then coming back later and re-looking it over with a fresh set of eyes, it seems that I do get it right each time and am happy with the job I've done.