As you may probably know, you need to expend more effort and energy in studying statistics than you would need for other non-math subjects.
This makes it slightly harder to effectively study statistics by cramming in a long 5-hour session at a go. This is called massed practise, and while it can work for some disciplines, it fails terribly at learning statistics.
The best way is distributive practice. Here, you set aside an hour or two each day for your statistics studies. And possibly take a day or two of the week off. Most students find this much more effective.