The resources listed above are great. I'll add a few books I got a ton of use out of (more than any other book by a significant margin).
1) Simon's Emergency Orthopedics
-my favorite book. My most used book. Excellent on splinting/bracing instructions for particular fractures.
2) Brukner's Clinical Sports Medicine
-my favorite Sports Med book. Lays it out by body region. Patient has lateral knee pain? Here's what to look for.
3) Malanga's Musculoskeletal Physical Exam
-my favorite MSK physical exam book. To the point...includes sensitivities and specificities.
4) Netters Orthopaedic Anatomy
-great handbook on anatomy. If you can understand anatomy and MOI...you can have a fighting chance to do PCM sports Med without a ton of formal training.
PT Haven. Love the website...has the best free content videos on physical exam that doesn't use YouTube (which is often banned on military computers).