The thing to do, if you do contemplate a partnership, is to have a clearly defined partnership agreement drawn up. Have it checked by a lawyer. The agreement should specify what happens if one of you de- cides to quit. How will decisions be made. These things all should be settled beforehand, before they have a chance to cause disruption in the business.
Nothing kills a business faster than feuding partners.
The third form of business is the corporation. It is NOT a magic bullet, like some seminar promoters would have you believe. There are two main advantages to incorporating. First, you can have people invest in your company and raise money. Second, because the corporation exists legally as a separate entity, there is a liability shield between you and your assets and the busi- ness.