I really enjoy watching a reality TV show called "The Profit". It is a show about a guy (Owner of Camping World and other businesses) who purchases struggling business and implements better process and such to make them profitable again. Almost all of the businesses are ones that create and sell a product like sunglasses so some of the information doesn't apply to businesses like ours. I have learned some cool idea from the show. Plus it is entertaining when things don't work out and the new business doesn't listen to a thing he says. I think you should check it out if you can.
I love those shows too! The Profit, Shark Tank, Bar Rescue - cool to compare how you run your own business vs. their philosophies. One thing for sure, ya gotta know your numbers and get the wrong people out as soon as you can. "Hire slow, fire fast." Among thousands of other ideas.