Some tips on how to write well in third person?

So I usually write in first person but I know that my story I'm working on now will be best in third person all knowing, I've heard at called other things, omnipotent, omniscient. But I know it's when all of the characters can have their thoughts and feel written about. Any tips for me on how to write well in third person all knowing for someone who's used to writing in first? Thanks!