Rich Hickey’s talk on “Hammock driven development” talks about this too and the idea of HDD is to load the information into your mind and then... wait. Relax. Allow your subconscious mind to process it and make connections between things. Then, after an amount of time (how long and how many times you repeat this depending on the complexity of the thing and whether you feel like you have some insight yet or not) you consciously think about it again. Hence “hammock driven development”: think about your problem to load it in, then chill in a hammock for a bit.