How can I start to improve rapidly any advice on how to work on my game away from the table?

Read a book?

Yea I am currently reading applications of no limit hold'em

Live or Online poker?

Reconstruct interestong hands from your previous session, street by street, doing range estimations, and equity estimations. Try and figure out what your opponent was doing, and what the correct response should have been. These don't have to be hands you lost, or even hands that you were in.

You want to constantly be increasing the number of things you consider when making a decision, and constantly adjusting those consierations to account for game situations. Practice, practice, practice.

And read, analyze, apply, and review. Read a book chapter or article, analyze how your game differs from the concepts they are preaching, apply an adjustment to your next session, review the results.

Read all the books
Practice
Buy Flopzilla and work on ranges
Post here and replay hands
Get lucky and hit a donkament
Get deal from sponsors
Retire young