What is your best tip for your main? [P.2]

I'll start:

I main Pharah, and I have a tip for her ult. Many people know that you can shoot a rocket and then ult instantly after for some extra burst DPS, but what many don't know is you can also shoot right after. Barrage often leaves tanks, especially Reinhardt, with low hp, so holding down m1 while barraging is useful.