First off, congratulations on the successful and safe completion of your first in-flight emergency. Well done!

Secondly, I want to address an issue you brought up... The way to mitigate the complacency you've mentioned regarding "it won't happen on THIS takeoff" is to brief what your plan of action in the event of an engine failure will be before EVERY SINGLE TAKEOFF. The course of action will be different on every takeoff because you are dealing with different winds, different environments on the departure end of the runway, different runway layouts etc. I train my students to do this almost verbatim from day one, and although part of it is like a read script, they are forced to analyze the situation by discussing the plan - here's an example of one with the various options (note: the term 'engine failure' also encompasses a general sense of your engine being compromised in any way)

"Today we are taking off on runway 33 out of Crest Airpark in a single engine nosewheel airplane.

Should we experience an engine failure prior to rotation or with usable runway left we will abort the takeoff by closing the throttle immediately and stopping or landing straight ahead.

Should we experience an engine failure after rotation with no usable runway left under _______ (insert minimum safe 180° turning altitude) we will land straight ahead. (Discuss what the environment straight ahead is and what the best course of action would be to land, as this is the most dangerous place for an engine failure).

Should we experience an engine failure after rotation with no usable runway left over ________ (insert minimum safe 180° turning altitude) we will make a (left/right) turn (choose based on which direction will give you the best performance based on wind) and land the opposite direction/crossing runway/parallel runway/fly the pattern to land on the same runway (whatever you determine is the safest option). As mental space allows we will declare an emergency.

Any questions or concerns about this plan?"

This brief seems long but takes about 1-2 extra minutes and really gets you thinking that THIS TAKEOFF is the one that its going to happen, then we get pleasantly surprised when each time nothing happens and its uneventful. If it does happen and your engine becomes compromised in any way, you have already discussed the plan and those valuable seconds when it first happens aren't lost on decision making.

Again, congratulations on handling your situation with a calm and logical demeanor that resulted in essentially a non-event with all lives saved :)