Don't listen to doctors tell you you're not qualified to administer first aid. They want to keep you from saving lives because they're afraid that if you do then they'll lose money and prestige.
Do make sure a woman is not just doing yoga or some other form of stretching before you stuff a cork the size of Rhode Island in her bunghole because you assume she's going to launch a thermonuclear fart in your general direction.
Don't be afraid to have several alcoholic drinks before attempting first aid, you need to be loose and uninhibited during times of stress.
Do make sure your first aid kit is fully stocked with lunch meat, a couple of doobies, and a packet of Tic Tacs before you leave the house.
Do be wary of anyone who claims that the best first aid you can offer them is oral sex, unless that person is Jennifer Lawrence, Salma Hayek, Emilia Clarke, or Karla Crome.
Don't hesitate to poke people lying on the ground, you have to make sure they're not just drunk or lying in wait to ambush you. Safety first.
Do bite ungrateful people to whom you've just administered first aid if they forget to thank you for your selfless act. Bite hard enough to draw blood to show them you mean business and that you're not going to take any of their shit.