Depends what you are seeing and what you are having most difficulty in dealing with. I sent one of my staff off to do the McKenzie lumbar course and it is required that they hold inservices to other staff on what they have learnt. I found this extremely useful as I see a lot of back pain (acute and chronic). When applied properly it can have dramatic effects and gives the patient a highly effective self management technique for which they are forever grateful and word of mouth referrals increase dramatically. Rotator cuff strains,tears, and impingement also a high on the list of must know how to deal with. The third highest complaint walking through the door seems to be neck complaints. I find Maitland techniques excellent for dealing with these. Probably the best advice I can give is to continually question what you are doing and try and to improve your strengths and continually work on your weaknesses. A really good sports medicine textbook is essential. Its gone AWOL at the moment but 'Sports Medicine' Bruckner and Karim is what I think its called is the best available that I have found. Best of luck.