I just write down on a calendar what has been injected and when and make sure not to hit any site more ofter then once a week. Then you can kind of coordinate injections around muscle groups being worked. That is with suspension 2-3x daily. Sites used are, outer quad, inner quad, hip, glute am & pm, lat, delt, trap, bi, tri. If you are doing eod, glute, hip,quad and delt give you more than enough and imo are the least painful.