Do-it-yourself parties will likely involve do-it-yourself decorations. But if you keep these decorations to a minimum, as well as involving using a minimum of two-themed colors, then the overall décor will look quite nice and coordinated.
For starters, focus on creating a centerpiece for unique spaces. Make a couple of centerpieces, and place one on each table, mantle, coffee table, entryway, hallway, doorway, and patio. Make sure it has the same theme as well as the same colors.