You know deep-down inside that you are a good person, yet it only takes about four seconds for someone to not like you or think you are stupid. This is a first impression and it seems unfair, but I myself am guilty of it as well. For example, if I see a woman on the subway with gross looking feet and/or fingernails, I am already not attracted to her. But, for all I know, she could be on her way to the salon for a manicure and/or pedicure. That is just one example, the list can go on for hours and hours.
So, it is up to you to make sure that you always leave a good first impression and there are ways to do that. One way is to keep yourself properly groomed at all times. You should always have nice looking fingernails and if you are wearing open-toe sandals, have well- groomed toenails. If you're a man, always be clean-shaven and wear nice clothing when you go to events. If you go to a party and you are the only one wearing a T-shirt, everyone will remember you as the person wearing a T-shirt and nothing else. Another way to make a good first impression is to be confident when you speak to someone for the first time. If you're a man and are speaking to a woman, she will know right away if you are nervous and to her, you don't have any confidence. Women love confidence. So, as you can see, it isn't difficult to make a good first impression, just remember that the next time you have to because you probably will not get a 2nd chance!