You might think that getting your work done super fast is a good idea but it's really not. It takes QA awhile to test your tickets and give feedback. If you clear your sprint board, PMs will add more assignments... Then on top of that extra work, QA will give you feedback from your previous work. You now will be super stressed to get all of this done by the end of the sprint.

It is best to take your time and get it right the first time... I've also learned to make a buffer... which is tickets in my queue I've already completed but did not say I've competed yet. This way I can take extra time on tickets that need TLC and the PM team won't surprise you with backlog tickets.