I failed first go, 250-300$ later. I ended up speeding in a school zone where I have never been before.
Ended up getting really pissed off and wanting to hit the instructor so I drove like a dick on the way back to the DOT. Then hit the f@$k out of my bag till my knuckles bled when I got home.
Next try, be observant, know the area and tricks around the place as the instructor will always try and get you on at least something. So maybe 1 or 2 hours before test is a good idea. Try and speak to them a bit, try and take up as much time as you can. Test only goes for 30mins roughly. Watch for signs, road markings and etc.
Lastly, practice reverse parking in between 2 wheelie bins, it's easy when you get use to it. Staying within lanes will only help after practice on driving on the road and maybe try lining something up with the car to help you remember. All of it comes a bit natural later on..