Spacing study out beats massing it: half an hour today and half an hour a week from now is retained longer than two half-hours in one day.

if I just try to do half-an-hour and then later in the day I do half-an-hour, I won’t retain that information as long as if I do half-an-hour today and half-an-hour one week from now. So doing that extra spacing should help me retain the information better.