Some good advice from the Real Simple blog (found via decor8):

The more assumptions you make about other people and their circumstances, the more time, energy, and emotion you squander. Here are some alternatives so that you can gain time and energy back into your day:

• Give others the benefit of the doubt. Did some guy cut you off in traffic? Instead of thinking that he’s a jerk, let it go. He could be rushing a pregnant woman to the hospital or really need to use the restroom. This strategy is particularly useful for when you come into contact with people who aren’t a regular part of your routine. Admit that you know nothing of their situation, and spend your time and energy on something else.
• Ask questions. In almost every situation, you can instantly find relief by simply asking a question so that you stop making assumptions and discover the reality. Did someone miss a dinner reservation? Pick up the phone and call him or her and ask why. Stop worrying and find out the answer.
• Be the better person. Take a second to breathe, imagine how an incredibly kind and savvy person would behave, and act accordingly.

No particular reason for this post, just thought it was a nice mentality to embrace and wanted to spread the good will and positive vibes. (Ooo, I sound so hippie-ish!)