I just got my site going and it's doing ok so far. Should I get some sort of tracker for adsense? If so, what?
You can always get tracker but the question is, why do you need it ? I'm not sure about changing orginal ads code. Channels are good enought to check if something's wrong or everything is fine.
Channels is the best method for tracking your adsense. You have URL Channels and AD Channels. This is the best way!
This way you can check if your ad placement is fine for any conversion and perhaps need some tweaking. So yes i guess.