Mugging

I'm trying to mug regularly on weekends. Cos i really dun want to repeat JLPT2 again. Just realised a pattern in my mugging habits today... I'll usu get sleepy in the first 15min. After i distract myself for a while, i'll feel more awake. However, as time passes, i'll begin to think of buying notebooks or pens and markers, or jackets. What a dangerous shopaholic i am.