What sort of tells should I be looking for online?

[MortimerJazz]

Is it purely betting patterns or is there anything else that I can look out for?

I guess I've moved on from noobie to novice, and would like to keep improving.

[Scrimmage]

Betting patterns like you mentioned (does he slow play made hands, check raise monsters, etc) and classifying players I find are both very helpful. Knowing who is weak tight is very helpful, for instance.

[donkbee]

betting patterns are the most important.