Around November last I cut my thumb and to be honest, I superglued it, worked fine and saved me a trip to A&E.
ST's work very well, but the bottom line in an emergency is to control blood loss using whatever is available, don't worry too much about infection, if you are dealing with major blood loss your first priority is to stem the flow as best you can with whatever is at hand (and a hand works very well too, yours or the patients)
303 gave the best advise, go and do a course, more than one if possible, and MOST important, practise and update your skills. I shudder when I read of the vast amount of first aid kit some people carry and the lack of skills they have to employ the gear (some of them, not all). Keep your skills basic and simple, or you can become more of a hindrance than a help when it hits the fan.
Just my penny's worth