Profit sharing, 401ks, are great. Defined benefits plans are even better but can be tricky because of the committment you must make to them. In either case, these are all excellent ways to keep money out of the hands of the taxman.
Also one thing you may want to do is if you advertise, structure your advertising costs so that perhaps you can pay up front for next years contract. My wife does that and she even got a 3% discount on the contract because of the up front payment. Also talk to other vendors you deal with like your accountant, perhaps even paying some of your lease costs up front if you can. Talk to anyone and everyone you pay for the operating costs of your business.
