AIRSPEED...stop looking at the instruments.....
Forget what that guy said, if you were looking out for traffic you had your priorities RIGHT.
Of course in PPL training, they don't practice spins any more, but I certainly hope you could recognise approach to a stall? Even though some airline pilots have a problem with Airspeed, in any light aircraft or glider if you have ANY airmanship at all, you can FEEL your airspeed is OK. You don't have to nail it!
(Though it is useful to maintain proper approach speed when on approach; a quick glance at the ASI from time to time should do.)
Like I keep telling everybody, to become a good pilot, learn to fly WITHOUT an engine....in gliders. That will give you the true basics.
And LOOKOUT is the one that can save your life if it is your habit to always be aware of whats coming at you! After you have your ATPL, then you can blame the controller....