One of my favorite - and easy and inexpensive! - ways to liven up a space when entertaining is using homemade tissue pom poms.
Pom decorations on my front porch for a baby shower
I use the directions on Martha Stewart... she also sells a kit at Michaels, but you really don't need it... any tissue paper will work! She recommends pointed or rounded edges but I am partail to the rounded - the pointy never seems to look quite as cute for me.
Poms decorating a Bachelorette Party Brunch
I've also found that it works best with thinner tissue - printed, waxy-ish patterned tissue just isnt as easy to work with. If you have more than one color, a great way to tie it all togethes is to make some poms with alternating tissue colors. Just be patient and work slowly when pulling apart the layers... always pull from as close to the center as possible, then work your way out.