First, make a list of skills that you want to master. For example, it can be:
English language learning
Oratory
Time management
Acting skills
But what if you want to learn English? Then, perhaps, it is less time to give grammar books (although this also needs to be dealt with), and more - practice and communication with other people. Also use flash cards, thanks to which you can learn new words, whole phrases and even rules.
In short, when mastering a skill, look for a variety of ways to apply tactile sensations.