I insist all my students verbalize a pre takeoff brief whaich goes as follows C150/152/172
In the event of an engine failure/fire before lift off I will
-close the throttle
-apply max braking
-raise the flaps
-advise ATC
-complete emergency checklist
In the event of a an engine failure/fire after lift off I will
-lower the nose to the gliding attitude
-If below 1000ft AGL glide straight ahead only turning to avoid major obstacles. If I am allready on crosswind consider turning towards the airport (not runway, just the nearest unobstructed level area)
-fuel off
-mixture ICO
-mags off
-advise ATC
-master off after flap deployment
The checks are done as a flow which starts at the fuel selector and makes a counter clockwise around the panel.
When verbalizing the checks I get them to lightly touch each control in order to build muscle memory. IMO your only hope in surviving this kind of emergency is to have automatic reactions that have been cemented in the brain by consistantly repeating them prior to every takeoff.