1. Be picky - Don't pick someone out of desperation, take your time and try to find the perfect person for your needs!
2. Do your own research - If you are liking the look of someone, talk to their last few employers or employees, find out the good and the bad before writing up a contract!
3. Have an exit plan - Make sure you have an exit strategy so the partnership can end smoothly without damaging the business and causing a lot of problems! Nearly all partnerships do not work out as they are not prepared for any kind of dismissal.