I've only crashed the once, and didn't enjoy it. I've helped investigate far too many.
My best piece of advice concerning take-off, is that for EVERY take-off, in any aircraft, in any field, work out in advance what you'll do at each point if there's an engine failure, brief it, and if necessary stick to it. For example "in the event of an EFATO I'll attempt to stop on the runway, if too high up to 600 ft, I'll turn slightly left and land in the wheatfields there, above 600 ft I'll turn right and fly a tight circuit back onto the runway". If you brief it, you might do it.
On landing, fly a circuit that so far as possible, would allow you to glide to the runway, or at-least a suitable landing site if the engine were to stop at any point. That probably means a tighter circuit than most light aircraft pilots are used to, so be it.
Higher, never fly where you couldn't land or at-least ditch, avoid low flight over forest etc - remember you've only the one engine.
G