When learning, there are times in which you are focused and times in which you allow your mind to wander. Both modes are valuable to allow your brain to learn something.

They are often talked about as helpful study techniques. 

Take a couple minutes to summarize or recall material you are trying to learn.

This is the idea of breaking what you want to learn into concepts. 

... have proven to be most beneficial to maintain continued progress and hold each other accountable. Finding the right group is key.

In order to avoid or break through illusions of competence, you should

Once you have a basic understanding of what you are trying to learn,

Do not spend too much time in one sitting going over the same material over and over again. The law of diminishing returns certainly applies. Spread it out over many sessions and over many different modes of learning.

When facing procrastination, think of the process over the product.