I am a huge supporter of the idea that you receive what you ask for. For this reason, I cringe when my classmates say that they are "definitely going to fail this test" or when people tweet that they "already know it's going to be a bad day." I want to tell them (and sometimes I do) that "yes, it is going to be a bad day", or "yeah maybe you won't do so well on this test," and then I add "but only because that's what you have already put in your head." If you put negativity into your life, negativity will follow you around. But fear not! If this is true, then the opposite must be as well right? I certainly think so. Try to put a little positivity into your day, think about what's going right, instead of what's going wrong. For chronic nay-sayers this might be difficult, but don't try to totally flip from negative to positive in one day, it'll feel phony. Start with one positive thing when you wake up, and see where it takes you. I think (and I hope, now that I've spent so much time writing about it) that you'll be amazed by how much better you feel.