Heads up racing!

If all goes to plan my dart will be hitting the track tomorrow for the first time since my motor rebuild. It's a Thursday test and tune then a race called Thursday night lights. Arm drop heads up elimination racing. I have never done it before and honestly I am just using it as an excuse to get some passes in. Luckily I got the quick time pro slicks so I can run in the street class :). I am hoping to run high twelves in testing then dial it back to a low thirteen for the eliminations. Does anyone have any words of wisdom for this type of racing?