If you ever have the chance to watch a motor race live, DON'T PASS ON THAT!
I had the opportunity to watch the Formula 1 Grand Prix of Budapest in 2011 and I believe it was one of the greatest experiences of my life. You probably see motor races on TV all the time, but being there live doesn't compare to the real race. The roaring engines and their sounds are incredible.
Besides races are a good opportunity to exercise your panning techniques.
First thing you need to do is to get a good seat. I had a seat in the main tribune at the Start/Finish line. It sounds great, you could experience the amazing start of the race, I had a perfect view of the teams' boxes and the pit lane, but when it came to shooting pictures i realized there was a better place at the end of the straight line, where the first turn of the circuit was. So, be sure to study the circuit and the tribunes, before you buy your ticket.
Go to the practice and qualifying rounds to understand how the cars will drive and to exercise your shooting, to find to good angles, etc.
And last but not least, prepare yourself for other race spectators, who find shooting pictures with their iPads is a cool thing. They might ruing your shots. There was one guy three rows down of my sport cu ruined my Start shoot of Sebastian Vettel. I was so mad, I could have kicked the guy.
Here are some of my shoots from the race.
One last thing, walking the pit lane and seeing all the cars, teams and drivers is amazing!