Floating Flower Tip - Most flowers float pretty well on their own until they start to pool with water and slowly sink. For a longer lasting centerpiece, use bubble wrap to make little skirts for your flowers.
How to make tiny pom poms with a fork. Wrap yarn around fork until fat, then cut. Take a small piece of yarn and tie entire bunch together so that the knot fits through the prongs of the fork. Take off of fork and cut all the loops.