How can i speed up in hw, sats, psats, tests, essays?

I am also a junior and also a perfectionist. I have learned that it is better to finish everything and then go back and improve things. Sometimes you just have to make a decision that quantity is more important than quality. Finishing all your work is better that doing half of it twice a good. Being a perfectionist has advantages and disadvantages. Right now you need to figure out how to overcome the disadvantage of being slow. The solution is different for every person. I just have to force myself to move on and finish other things before I waste time on overdoing ignments. Best of luck with your situation!