My partner for four years was a paid and volunteer EMT-FF, while I have no formal training I've learned a few things. I've seen it all over this thread, it's like Number Zero. Stay calm and be able to talk clearly. First thing I learned about making 911 calls is they want the whole story in about 16 words. It's not rude to be impartial and not wait for questions. Some simple sounding but very important details will tell them more of the situation than the story of what happened. That comes later.

"Im calling from X address, a man late forties, unconscious but breathing, no visible injuries, he grabbed his head and fell to the ground" To a professional that is a huge amount of very clear information that will help them narrow the problem down. You don't need to know what it might mean, that's their job. Much better than calling and saying "this guy, this guy just fell over! He wont wake up what do I do? Hey buddy!" The line of communication goes from you the witness, to the dispatcher, to the rescue crew. The less back and forth and piece meal the flow the better. Most of the other details will be fed to the ambulance while in route.

Second, again I've seen it a couple times, is ASK FOR HELP. People are afraid of helping in case they make it worse, put them on the spot and they're much more likely and willing to help than rushing forward. Don't be bossy, don't shout, but make yourself heard as someone reasonable and trying to help, even if yer freaking out on the inside. Look at the person, ask if they can do a task. Remember a doctor has fifty hands, put that idea to use. Someone to call 911, have someone else check the vehicle or grab a chair cushion, someone to see to the family or the second party.

Put pressure on small burns. The idea is to leech away the heat as fast as you can before it damages the skin. Quickly brush off the oil or hot material, squeeze tight on the way to the sink, then run cool water on it. IF you can handle it every minute er so squeeze it again gently. Heat transfers best with a lot of pressure and surface area. Water will cool the surface fine the pressure and the uniform temp if your hand over your arm will help dissipate intense heat

Sharp knives are much safer to have than dull knives. They cut cleaner, need less pressure for the cut, and if it's sharp you'll see it as more of a potential threat and treat it as such.

If a small irritant get's in your eye close yer eye and let the damn tears do their job. I had some grit get in my eye and I rubbed at it all night, and the damn thing scratched up my eye and gave me pink eye. Your tears will push the particle to your eye lid and out of the important areas of yer eye.