Do three things well, not ten things badly

I agree with this because it does not matter how many things you do, the important thing is how you do it. If you want to do something in a good quality, you have to be patient, because it takes a lot of time and energy, but in the end, you will be proud of what you have done. I think that a professional is not a person who tries to do everything quickly, but a person who does everything with patience, love, does not think about time, thinks only about the quality of what he does. So you can do so many things very quickly and none of them will get done well, but at the same time you can do a few things and they will all be done well.