That’s a hard question to answer. I always say going into business with someone is like getting into a marriage. Good partnerships happen when one of the partners complements the other’s weaknesses. For example:
One partner is not very organized but is excellent at bringing business in and producing the final product. The other partner may not be good at closing deals, but is great at managing the finances and keeps things running smoothly.
Another thing to keep in mind is communication and goals. Successful partners are focused on the same goals and willing to work together to reach them. Clear communication is the only way to ensure you and your partner are working together.
Like marriages, I have seen many succeed and others end miserably. My suggestion (in both cases of marriage and business) is to make sure you truly know your partner, make sure you have a similar future in mind, and that you can work together.
Going into business with someone is a big commitment and should not be taken lightly. Make sure each partner can offer something to the business.