When I Am in a Bad Mood (please correct my essay~)

I seldom feel bad or suck *stuck* in a down mood. It's not because there are no difficulties in my life. In fact, I sometime feel stressful *sometimes feel stressed* and worried about my future. However, I have my own ways to solve *my* bad mood.
I have three ways to cope with my negative emotion(s) and that *they* are eating, playing the violin(,)and writing *in my* dairy. When I am frustrated by my poor grade(s), I buy delicate(no coma here) sweet desserts and eat them all. The bad feeling seems *to* be eaten with those sweets. Sometime(s), I get upset and can't focus my mind because some trouble  *something is disturbing* me. Then I will go to play the violin. Through the notes I play, my mind get *is at* peace. Canon is the most useful song. I regard it as my musical medicine. Every time I play it, all the thing(s) I dread disappear. Last but not least, writing *in  my* diary is also a way for me to solve my depression. The *My* diary is my best friend. It can contain my complaint(s) and never tell to others. Moreover, writing let(s) me clarify my chaotic thoughts and help me face those problems.
With the three tips, I can handle my daily life without being too fatigued*. I think the most important key of dealing with *a* bad mood is finding little, wonderful thing(s) in life to make us happy. Relieving your pressure everyday for fear that the bad mood *will* collect gradually.

 This last sentence doesn't flow naturally for me. I don't want to change the flow of your writing too much but i would say it a little differently. Maybe like, " Because we don't want our bad moods to gradually collect, its important to relieve ourselves of the daily pressures of life."

Overall i think this is great! It was easy to understand and read, definitely look out for plurals of words though. I love writing in my diary too, its a great stress reliever. Keep up the great work! :)