The way to maximize long term winnings is to get really good, not play mindless hands. Guys on this site make >100k's per year. Get that good, and you'll win plenty of monies. Play the number of tables that maximizes your learning potential on each hand.

If you don't have time to take good notes on a dozen hands per hour (or more!)...

If you're timing out accidentally even once per session...

If you're not adjusting to position/villains/stack size on every street...

If you know you could learn more each session if you had more time to think instead of clicking away furiously...

...you've got too many tables open.