Raise the floor before worrying about the ceiling.

Peaks are exciting and your floor determines what people can rely on. Raising the worst version of your work does more for the whole than pushing the best version higher, because the worst version is what shows up on difficult days, and difficult days are common. It is also the less enjoyable improvement to make, which is why it is often skipped.

Look at your poorest recent work and ask what would have prevented it. Usually it is a check, a rule, or an amount of time. Fix that and your average will move more than another burst of brilliance would.