Bikes said a lot of valuable advices, but some of it can't be so useful for STT's.

My point of view:
I think preflop completing with KQs is absolutely fine, i am pretty sure that any top reg wouldn't played it differently.
Flop: you can lead out or make a strong c/r, but definitely not c/c because another club might kill any action and also you should protect your hand against sombody who has the Ace of clubs.

Your graph is pretty sick but i am sure you will go up soon again....
GL