Staying sharp during blitz action

The position below is from my US Chess Federation rated online blitz event. Yes, you can get your official USCF online ratings from the comfort of your own home. Both chess.com and ICC offer USCF rated events (blitz and active) several times a week. Give it a try. Your membership dues include a subscription to the monthly Chess Life magazine.

​In the position below it's White to move. Level: easy. What's white's next killer move? 20. ?

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Solution:

​I know it was easy but sometimes during blitz games it's not. 20. Qc2 wins a piece because it's a double attack. The c8 bishop is hanging and we are threatening mate in two 21.Qh7+ Kf8 22.Qh8#. Black played 20. ...Nf8 21. Qxc8 +-. I had plenty of time to collect the point.