What worries me the most about new-to-track-riding newbs is that they worry too much. they worry about who's behind them, what's happening down track, what the flag marshals are doing, what THEY THEMSELVES are doing making sure that they aren't doing something to raise the ire of race control... because they really stress safety at the track and they lay down the law before a wheel steps on pavement. So a lot of newbs will not want to get in trouble so they ride overly cautious. They brake too soon, they don't roll on throttle where they should, etc. etc.
The biggest piece of advice i can give to any new track rider is BE PREDICABLE. just ride your ride. to hell with what's going on behind you, THAT'S THEIR PROBLEM. they can pit in and get a clear track if that's what they want. If they need to pass you it's on them to pass correctly and safely. chances are pretty high that there will be no passing allowed in corners either inside or outside for the level you'll be in (beginner, novice, C, slow, whatever) so they will pass you on straights with a 6 ft rule (pass must be done with 6ft between riders for safety and less freek-out factor, especially when newbs bring 1000CC superbike to their first TD).
The more comfortable you become, believe it or not, the faster, smoother, AND SAFER you become. that makes everyone feel good!