Spending time with negative people can be the fastest way to ruin a good mood. Their pessimistic outlooks and gloomy attitude can decrease our motivation and change the way we feel. But allowing a negative person to dictate your emotions gives them too much power in your life. Make a conscious effort to choose your attitude.

Acting tough is all about developing an attitude and a persona that says, 'Look at how great I am.' But often, that tough exterior is meant to hide self-doubt. Mentally strong people invest more energy into working on their weaknesses rather than trying to cover them up.

It'd be nice to learn enough from each mistake that we'd be guaranteed to never repeat that same mistake twice. But, how many times have you said, 'I'll never do that again,' only to find yourself right back at it a few days later. Learning from our mistakes requires humility and a willingness to look for new strategies to become better.

If you quit every time you face a new challenge, giving up can change how you view yourself. You may begin to think you're weak or that you're a failure because you can't seem to stick with things long enough to see positive results.

One of the major dangers of being alone in February is the tendency to dwell on past relationships. Whether you're daydreaming about that 'one that got away,' or you're recalling the fairy tale date you went on last Valentine's Day, romanticizing the past isn't helpful - nor accurate.

Idealizing the reality of past romances won't do you any favors as you face Valentine's Day alone.