I love the Mix-A-Kits over at ScrapMatters. They all use the same color pallet and a general theme. You can then pick papers from one designer and elements from another and an alpha from yet another one...very cool! You could always pick everything from the same designer, too.
For this LO of Tom & I during our 2010 Anniversary Trip to WDW, I used pieces from the ScrapMatters February 2013 Mix-A-Kits. The ones I picked are:
Shabby Love:Ellies by LDrag Designs
Shabby Love: Solids by LDrag Designs
Love Changes Everything Word Bits by Andilynn Designs
Love You Dearly - Patterns by Juno Designs