Paying too much attention to all these tips about what to do when the plane's in the air

Thus overlooking a thorough pre-flight including (but by no means limited to, I'm sure...I'm including 10, I'm sure others will add more) the following:

1) Control surfaces firmly installed, and move the entire range freely.
2) Landing gear bolts tightened and secure, landing gear roll freely. Tires in good repair.
3) All control horns and clevices/z-bends/other connectors secured to control surfaces, moving freely, and damage free.
4) All covering in good repair and taught.
5) Engine and engine mount secure, no wiggling or vibration.
6) All pushrods/pull-pull cables securely fastened to their respective servos, and servos in good repair. Check for stripped gears!
7) All fuel system lines secure, undamaged, properly routed.
8) Wing retainers (rubber bands, bolts, glue, whatever) secure, tight, and all there.
9) Battery(-ies) charged and tested under load.
10) Basic flight surface check with radio on. It's not enough to make sure they wiggle, make sure they wiggle THE RIGHT WAY.
10a) Is the bleeping radio set on the right model??