Below is a scan of the handout Jim sent around ... some good simple exercises, especially if you have access to a gym (but can be done at home as well).
The following links were included in the handout Jim sent around:
Paddling Training
www.bodyresults.com/e2pushups-pullups.asp
www.bodyresults.com/e2nogym.asp
Core training
www.bodyresults.com/e2medballs2.asp
www.bodyresults.com/E2medballs.asp
Rowing-specific
www.bodyresults.com/s2rowideas.asp
www.bodyresults.com/s2rowpolygon.asp
Grip and Upper Body
www.bodyresults.com/e2upperstrengthrock.asp
Rotator Cuff