My tip is to download the quickest set for that track from the Setupfield (
http://setupfield.teaminferno.hu). Then do some laps, say 15. Then download the WR lap and go through it corner by corner. Then do some more laps. Look at the WR lap again. And keep doing that until you're happy. For me, 1 second off the WR is a good lap at most of the tracks we visit this season, so aim for that.
Oh, and remember to be smooth, that's the single most important thing with the UF1 IMO