Depends whose opinion on importance you're using for prioritization. If you postpone things that aren't important to you, but are important to your boss, that'

Depends whose opinion on importance you're using for prioritization. If you postpone things that aren't important to you, but are important to your boss, that's not going to go well. If you postpone things your boss doesn't care about, in order to do a better/quicker job on something the boss considers important, that'll probably make your boss happy. (Note, I'm using "boss" as short-hand for "your boss, and all the other interested parties, customers, etc. who can affect your boss's opinion of you".)