Pruning tomatoes

I didn???t make a habit of pruning last year, and the size of the tomatoes wasn???t that great. This year I'm pinching suckers from 30+ plants from the bottom of the leader stems, which have flowers on. As I understand it, suckers create stems right above the leaf branch, stemming off from the main plant. Pinching them out while small will reduce disease risk and improve fruit yields, creating a single stem.

Only problem is you have to keep pinching new suckers.