Chelle, I always start out good, pinching all the suckers. Then other garden tasks keep me busy and I forget. This year I am trying really hard to keep at it, even though there will always be some I miss. I think one year I will do a comparison with two same variety tomatoes, side by side, pinching one and not the other and see.
I always want to leave them to make more vine and more blossoms and more tomatoes but it's probably better to put that energy into fewer, larger fruit. Here's a picture of my largest one so far, Better Boy.