5. Neglecting your hygiene/appearance
This should be pretty obvious, but you would be surprised how many people arrive at their dates with bad breath, fingernails that are in desperate need of clipping, unkempt facial hair, or overpowering BO. Take a shower and make sure those clothes are clean and wrinkle-free before you leave your home
6. Flirting with another person in front of your date
If you’re on a date with somebody and they catch you flirting with someone else, kiss that date goodbye. Not that you would actually get a chance to kiss them. They’ll be gone long before then.