So we have game selection and position already mentioned, but I'll be a bit more specific, or atleast more specific to me.

"The ability to find the one player at the table worse than you."

This is even an extrapolation of the Rounders opening quote, "If you can't spot the fish, you're him". Well spot the fish and take his money. After he busts, it might be time to leave. Suck it up and move on, don't try to outplay those better than you.

On a personal level, it's very clear, I'm not a good player, but as long as I can find someone worst willing to mix it up with me, I can be a winning player.