You can do a lot of the preliminary work yourself. See Nolo Press' web site for some starter material.
However, be SURE you get an attorney to do the final legwork for you. The reading and study you do ahead of time may actually save you some billable hours from the attorney but he's going to make SURE it's right. It's worth the money. You do NOT want to have a forced liquidation because you made a stupid mistake.
There are a few things that make an attorney worth their money and this is one of them.
"Great genius will always encounter fierce opposition from mediocre minds." --Albert Einstein.