I plan, plant carefully, and watch what happens. Then I change my mind, make a new plan, plant carefully, and etc. This may go on a day or a week. If I refuse to like it, I will finally resort to just plunking it all over the place, until I am too tired to move it anymore. It is a system I have used through out my beds for years and years, And though I make myself crazy when a plant hits me this way, the truth is some of these anal addictive plunks have resulted in a few of my favorite spots in my gardens. Some fall under the "What was I thinking" category too.