I'd like to think I'm pretty good at most things but I don't know all there is to know about certain services I'd like to offer in the future. For instance, I know paver installs aren't hard but I don't know how to do them perfectly. Would it make sense to hire a sub and watch them to get the experience? I don't want to offer a service I can't do but I want to have a wide range of services in the next few years. I guess the main question is how have some of you learned how to do some services you didn't know how to do before?