Learn in different locations. Mixing related skills in one study session makes them easier to learn. Spread your study sessions and testing/reviews over time for best retention. Highly-focused immersion is not always better than a more eclectic approach. I think the overarching theme here is that making it easier for yourself isn’t always the wisest thing. If you give the brain some variety it will do remarkable job of pulling things together.

Forget What You Know About Good Study Habits – NYTimes.com