Like the others mentioned, get the last several years of OSHA logs and look for the most common problems... But the fact is, that with most industrial settings you may see everything from spider bites and splinters all the way to amputations, major falls, or complete head and body trauma.
Also, if there is a "near miss" reporting process where you work, look at those. These are just accidents waiting to happen, and they can tip you off on potential injuries.
Finally, join a local or state association for OHNs. The national association is http://www.aaohn.org
Start networking with OHNs in the same industry. Don't re-invent the wheel, if there are others out there who can help you.
Best of luck to you!