first aid courses - recommended, even if not perfect
I'd go further - everyone should go on a first aid course. There have been several occasions in my life when knowing how to resuscitate people who have been pulled from sea, dealing with several nasty head injuries involving cuts and / or loss of consciousness, dealing with friends' children with various cuts, scrapes, stings, broken arms etc has been very important. None of those incidents happened when I was working in clinics, hospitals etc. Even if some instructors give slightly / very poor advice about dealing with hypoglycaemia, knowing what to do in other circumstances can save a life or minimise serious harm - for example, a friends' father had a heart attack in the street and was saved by 2 "alarmingly dressed" young women with "brightly painted finger nails", who kept his circulation going until the ambulance arrived - the important fact being not what they looked like, but that they knew what to do. I attended many course over the years, not least because my mum was a first aid instructor, but by the time my sister and I were teenagers, she insisted that we each did proper courses - about 10 evenings. We were able to count these courses for our Duke of Edinburgh's Awards, so got an added bonus for ourselves, as well as being able to help other people in the 30 odd years since then.