I wouldn't bother trying to increase the supply in the less full breast - it is just normal and not something that needs to be "fixed".
I'm exclusively pumping for my 2nd daughter and with my double pump, I spend equal times on both sides but ALWAYS produce more from my right than my left. That's just how it works. Nothing to "fix".
With my first daughter, I directly breastfed and never noticed that - but I did know that I felt more comfortable with her on my left side (easier to hold her that way) - but she preferred the right (now I know that it was the fuller side).
Some people will tell you to feed entirely from one side, and then the next feed to feed from the other side completely - I did that with my first daughter, and it has pros and cons. There is no need to switch half way if you do that, so you're not disturbing the baby. BUT you get that "lopsided look" if you know what I mean! And it's sometimes harder to remember which side you're up to.