So if you're heading into a job interview or a first date, you'd better hope you don't have snot in your nose or a pizza stain on your shirt.
Let's face it though: Snot and pizza are facts of life, and bad first impressions are bound to be made.
Fortunately, using a little bit of psychological savvy, it's often possible to reverse those impressions. Here, we rounded up five tricks to overcome people's initial evaluations of you.
But hey - bring a napkin, just in case.