Sideslip on a Cessna with full flaps is only a good idea if you're not the owner of the airplane. On some models it's not allowed, on others not recommended. In any case it is not good for your flaps.
What works pretty well in a Cessna is pushing the nose down, it won't get much faster. With a bit of experience, you will try harder before going around. It costs time, money and makes a lot of noise. You still need good judgement though...