Force your tactics to work!

I was playing a game recently, and the game quickly entered an incredibly sharp sideline of the Benoni. 

"The hardest thing in chess is to win a won game." ~ Frank Marshall 

The tactics, if anything, seemed to favor me so I spent about a quarter of my time on move 19, and unfortunately was unable to find the winning combination.

Of course, the logic behind those moves seems so simple in retrospect: I wanted to make the exchange sac work so badly, and I'm still kicking myself over missing what seems so obvious now. I was really eating up my time and decided that Ng4? was my best bet to keep the pressure on. My opponent played well from there on, and I didn't. He made a great comeback, and in the resulting time trouble I found myself in, I blundered a mate in two and was forced to resign.