The best extra time you can send during a repeating project is making a checklist.
In a one-hour project, spending an extra 5-10 minutes in a Google Doc as you go will yield a thorough checklist of everything you did. The next time you do that project, it might only take 30 minutes. That checklist pays real time dividends immediately and they compound.
Additional benefits? Your project is now transition-proof. If you pass off the job, the next person will be able to take over seamlessly.
And the act of creating that checklist will give you a built-in cross-check. You’re less likely to skip a step while you’re creating the checklist, and even less likely in the future, because it’s on the list.