If you have access to any level of football pitch, take it. Have a jog, do some crabbing up and down the line, sprint along a diagonal. Just take the time to be you on a pitch and think where you'll be at various restarts.
It's not an exact science, but slowly you'll naturally end up in positions that a) work for you, and b) you'll be expected to be in.
An easy tip for lower league colleagues is - especially at goal kicks - run back to your restart position. It looks so much better, and you can take a breather there, and everyone sees that you're very mobile.