Ok so these days my fitness level is getting pretty good but my mental endurance isn't great at all. On a Monday I have 1 hours mma with an hours break then 1 1/2 hours kung fu. Both classes have sparring, plus I'm taking on new techniques in mma, but by the time it comes to kung fu I struggle to even remember my basic forms! I have my black sash grading coming up in October, basically it's a weekends course then the syllabus grading at 5pm-8pm on the Sunday night. If I carry on like this I'll be a wreck mentally

Anyone got any tips on increasing mental endurance or is it something that will come along eventually?