Doing a little over a long time will more be more comfortable and achievable. For a couple months prior to interviewing, pick up CTCI or another similar text an

Doing a little over a long time will more be more comfortable and achievable. For a couple months prior to interviewing, pick up CTCI or another similar text and try to spend 15 minutes a day (at least) reviewing your algos, data structures, and system design. After you get in the habit of trying every day, you will probably find yourself able to spend more time more effectively as you learn the content.