This is the only job I've known, during the summer, I would carry my Dad's tool bag on late night calls. I got in at the innocent age of 16, in the short 28 years I have been in, its changed a lot. The industry has and is changing constantly and not always for the better, the industry is what you make of it, have a positive attitude as much as possible, even though that's not always possible. Learn from every person you work with (good lessons and bad lessons), always look for ways to improve your knowledge base, never stop learning.