Garage 61 is a fantastic tool. Best way to gain time on a track. Gives you an insight into what the aliens are doing to take that extra few tenths (or 4 seconds) on you
Great tips. But the get payed to race thing is not cost effective. If for example you are racing Ferrari 296 and you decided to race every race in that season then fair enough. You will need to buy every track you don't own at $15 each and get a measly $8 back as it class D. One of the best tips for iRacing I think is active restart. for practice sessions to learn a certain part of the track you are having trouble on.