I've been thinking about starting a small business lately, but I'm looking for some ideas. Any thoughts?
Yes! You could use design thinking to allow creative strategies to be developed for your new business! 
design thinking? I've never heard of that, perhaps I'll look into it. As far as creativity I'm thinking about an online t shirt company.
Ah so you'd be running something along the lines of a design management. You provide designs, strategies, and supply chain techniques! So you'd be consulting on designs and print t-shirts for people who inquire your company!