Tension your chain... that seems obvious, but on a fixed gear chain tension is critical to safety as well as a quiet ride. Without a tensioner, you need to pull and jockey the rear wheel to get the tension and then wrench it down without losing the tension. Chain tensioners essentially pull back on the rear axle and are adjustable to change the tension.

It's still desireable, but less critical to have a chain as tight on an SS as it is on a fixie