Interleaving: Varying your subjects

... space out learning over a longer period of time, and it randomizes the information we encounter when learning a new skill. 

Interleaving causes your brain to intensely focus and solve problems every step of the way, resulting in information getting stored in your long-term memory...

Once you have a basic understanding of what you are trying to learn, practice jumping back and forth between problems that require different techniques. This will solidify your understanding of the concepts by learning how to choose to apply them in various situations. 

Mixing lessons and examples produces much better learning that can be transferred into the real world.

You're going to have to figure out the method you need to use for specific situations. And you can't learn how to do that unless you have experience dealing with a mix of different ...