Impatience

I am really not a patient person. I find it so hard to wait for things to happen.

Right now I'm waiting for a literary agent to get back to me to see if they want me to send them a manuscript. And it's so hard.

Every time I check my email I think, "Oh, I might get something today," and every time I hear the phone ring I'm disappointed because it's not someone who wants to read my novel. 

I need some tips for waiting patiently. Is it really possible to do it?