Since the possibility of disputes is always present your agreement must include a place to cover how any disputes will be handled. This way everyone has already agreed to how these disputes are to be taken care of and cannot argue the point and cause further problems for the rest of the members of the venture. This may end up being the most important area of your agreement and should be filled out very carefully to avoid any possibility of a legal challenge.
You are venturing into a business partnership with your best friend, your spouse, or your cousin. If you think you are safe from all the business conflicts that arise in most start up ventures because you know your partner very well, think again. Most conflicts and legal contests are because of this ignorant belief. You have to protect not only yourself but also your partner. Hence it is best for you to draw up a partnership agreement template before you decide to commit yourself.