The best way to keep more of your money yourself and less on the lawyers is to agree to split up and continue agreeing all through the divorce. Split everything equally and go your separate ways. Couples that can't agree during divorce end up spending a lot more money on their lawyers. Good Luck!
You can get the paperwork online and file it yourself. Depending on your income, you may be able to get help filing the paperwork through your local social service agency.
First off, Divorce and cheap is an oxymoron. You can, however, get by with spending around three to five hundred dollars if the divorce is uncontested and there are no minor children or real property involved.