Use White as the background
1 or 2 pics but no more than that
Use at least 3 colors (more if you wanted)
Use tape somewhere visible on the layout
BUT there was a twist. We also had to creat an ATC with the same background and colors to coordinate with our layout. Here's what I came up with:
The pic on the top is one of my favorites of the Hubs and me.
There's a piece of lint on the ATC. Right on my head. Never noticed it until I uploaded the pics. Oh well!