
Don't borrow money, the government collects fees on banks, credit card companies and in general large corporations pay big chunks of corporate tax so by cutting down on their business we cut down on government revenue.
Support local business. Large companies pay big tax bills and small companies not so much and some small shops will give a discount for cash. When possible buy used items, this cuts down on import items as well and keeps money in the local economy so it goes without saying private sales are totally tax free and cut the government out of any share. Bartering is another excellent way to not only cut off government funding but save a lot of money as well. Another little known fact, if you buy a car for example from a private individual you will pay tax on the price when you apply for the tag and title however if you barter or trade for the vehicle there is no tax, in our state for example when you apply for the title you simply put "trade" where the form asks for the price paid and the tax is zero, in fact I have never had it questioned it is none of their business what you trade. Craigslist has a whole section devoted to items for barter or trade.

I am just a little voice in the wilderness but I will do my part to starve the beast and it goes without saying less money to the government means more in my pocket, how can you argue with that.