Just walk round so the sun stays somewhere over yer shoulder..
It can be a real pain shooting into the sun!
One of my personal favourite spots for GP circuit shots is around 3PM, inside at Becketts...
Nice light, high speeds, and easy work to follow things.
This gallery of Historics should give you a clue?
http://www.catmangler.smugmug.com/ga...NbEC#202685917
Have a great weekend, whatever!