Seat belt, floor the gas pedal and drive the sidewalks... you get more points in areas with outdoor cafes full of peopl.....oops....
Sorry, that's a video game....
By now you should know what you do best behind the wheel and what you are nervous about or don't do so well with.
I'm in the U.S., don't know where you are.
Here in the States, from my experience, it seems the parallel parking is the worst thing most folks I know dealt with.
Basically I'm suggesting practicing what you feel the least confident in and don't worry about the rest now.
Are you taking your test in the car you have been driving most?
If you cannot get plenty of 'behind-the-wheel' time in that car, then at least spend some time sitting in it and familiarizing yourself with all the controls.
Once you're on the road with the tester onboard, you may get nervous and do things like turn the signal indicator to the wrong direction, or forget how to undo the emergency brake, etc.
Sleep well and long the night before.
Where I live, you go to the DMV (dept. of motor vehicles) building and they have you drive from the parking lot around a few blocks and back.
If you know where you are taking the test from, perhaps you can practice driving around those streets looking for places that might foul you up... like one-way streets, or lights, or odd intersections.
I wish you well!
Let us know how you do! 
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fides solus
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