Accept the fact that some people won't like you
No, it's not easy to cope with the idea that the woman three cubicles over can't seem to warm to you. But if you continue to fret over it, it'll bring you down-and it won't change her opinion. While friendship buffers stress, negative relationships can pose real roadblocks to happiness. "If you take everyone's judgment to heart, you surrender your own ability to view yourself clearly," says Baker. Next time you find yourself thinking about your office nemesis or worrying over a comment made against you, pause for a moment and recall the last compliment you received from someone you trust. Remind yourself that he or she has a good sense of your character. Then think of the things you've accomplished that mirror that compliment. This simple act will turn you into your own biggest ally and make you feel powerful and in control.

Widen your circle of friends
"Relationships with close friends are one of the best vehicles to happiness," says author M.J. Ryan. "These bonds give us a sense of purpose and come with just as many emotional benefits as a romantic partner does." Additionally, research shows that friends keep us healthy, reduce anxiety, and even foster longevity. In fact, friendships are so critical to a woman's well-being that the opposite of friendship-social isolation-has been found to be as damaging to one's health as heavy smoking is, according to the Nurses' Health Study from Harvard Medical School. To make the most of your ties to others, put the same energy into your relationships with your friends as you would into a relationship with a significant other. Be enthusiastic, set aside time for special activities together, and keep each other updated on your daily lives. Your reward? Your pals will do the same for you, which will create feelings of support, belonging, and gratification.