Who said "This is what I'm doing now."?

This quote is attributed to George Costanza.

This is what I'm doing now. - George Costanza

"This is what I'm doing now."

George Costanza

"I'm out there Jerry, and I'm lovin' every minute of it."

"These pretzels are making me thirsty."

"Master of my domain."

"It's not a lie if you believe it."