>I want to use motivational sayings, movie/book quotes, etc
>and print them on my product. What restrictions are there
>that I need to be aware of?

Familiarize yourself with the fair use laws, which might allow you to use small portions of copyrighted work without permission. Since the law can be tricky to analyze (you have to compare four factors, and there are no hard and fast rules) it might be worth searching copyright cases to find specific instances in which book and movie quotes have been upheld as fair use in similar circumstances.