The short answer will be to keep you sane.
The long one and detailed one will start from here. Try to write diary everyday or every other day. People like to give excuse like I don't know what to write, I am a shy person. For the first excuse just write anything like what you eat (I believe this first solution would work well on my sista… Peace Nad!!), or what you did during the day, or what you saw or what you feel at the moment. Usually when we are in too much condition we'll write easily like too angry, too sad, too in love, or too happy. We'll write like we are breathing sometimes even our hand can't keep up with the speed of our thought.
Nah now for the shy reason, come on you'll be the only one who knows about the content of your diary (I assume, unless you intend to publish it, make a movie out of it, or show it to others, btw I like the first two ideas). If it became a book or even a movie all the things come from your diary will be sure real and pure, it comes from the heart and thought of yourself. You'll read to this section and confuse what is the correlation between keeping you sane and shyness and no topic.
The correlation is when you write in whatever condition you felt you don't really think such as when you were in love you write cheesy lines, when you were upset you'll write too many lines that might need so much cencor or when you're happy you write so many positive things. Days, months from now read it again and it'll make you smile, embarrass of your cheesiness, when you're down read positive things will give you good effect, and think about what happened in the past and what it affects to your life now.
Your diary can be your personal guidance about how sad, happy, in love, angry, upset you were in past days. You can learn things that make you better. And when you feel that your are going to be insane, your head wanna explode, your eyes will burst in to tears, your heart beat is like crazy but there is noone to talk to, noone you trust enough to share your misery. Diary will be your friend. And ofcourse for you the one that believe in the presence of God. PRAY!! It'll ease you pain.
Because diary is a very personal and keep all your secrets in life. Be careful to put it. Or you can use online but use anonymous and don't please one more time PLEASE don't share the link to your family and friends if you would like to keep it secret..
