I suggest that you don't move on to next day until you've mastered this topic.
To help you focus on powers and roots, you can use BTG's tagging feature. For example, here are all of the questions tagged as powers and roots questions:
https://www.beatthegmat.com/forums/tags/ ... -and-roots
See the left side of that linked page for more tag options.
You should also spend a lot of time reviewing the responses from the Experts on this site. They model the steps one should take when tackling math problems.
I hope that helps.
Cheers,
Brent