It's amazing what you find lying around a rowing shed when it's being cleared out. Above and linked here as a PDF, we found this rowing drills table that matches drills to technical issues.
I'm not entirely sure what all these are, so here's some youtube videos to get started. If anyone can enlighten us on the "stuff the duck" strill, the "OSA Full Pressure" or "toddies", that would be great. Here's some drill examples (some awesome, some not so much) to get you fired up for the season ahead.
Crossed arms rowing:
And this is my particular favourite: How to get back in after flipping a scull: