Another thing you can do is get the winds for them on the way up. Work out your TAS, plug it into the GPS, read off the winds and let them know for several different levels.
They will love you for it especially if you start noticing a consistent change in direction.
Don't forget to make it VERY clear when you are not cleared to jump due either traffic or ATC clearance.
The advice about carrying a nice sharp knife is sound. Around 2 years ago or so a young female pilot was put in the position of having to cut a Tandem free from her aircraft which got caught up and were unable to free themselves. All ended well, however it could have become very ugly indeed were they to stuck to the aircraft (especially given the limited reserves you are often required to take)
Jump flying if done correctly, can be a great way to reinforce and practice what you were trained to do without the pressure of an instructor watching you. Don't bother spending too much time in the caper though as you are unlikely to get paid enough, progress on to twins or gain the charter experience that you will no doubt need on your way to bigger any shinier aircraft.
Have fun.