If you have a marvellous business idea and are concerned about keeping it safe, check out this article on Confidentiality Agreements.
In my own business I am pretty certain that we all stand on the shoulders of giants: someone taught me what I know, and I taught others. And ideas are a dime a dozen, implementation is key!
For my business more than confidentiality I’m concerned about intellectual property. I won’t sign an agreement with a client which gives them sole copyright for the materials I develop for them: I insist on joint copyright. You can get copies of my own terms and conditions when you sign up to my template series here.