Can you suggest me some small businesses ideas?

I can suggest you the Crowdfunding.  According to wikipedia encyclopedia Crowdfunding is the practice of funding a project or venture by raising monetary contributions from a large number of people, today often performed via internet-mediated registries, but the concept can also be executed through mail-order subscriptions, benefit events, and other methods.[1] Crowdfunding is a form of alternative finance, which has emerged outside of the traditional financial system.[2]

The crowdfunding model is based on three types of actors: the project initiator who proposes the idea and/or project to be funded; individuals or groups who support the idea; and a moderating organization (the "platform") that brings the parties together to launch the idea. 

I'm sure this is a small business that can successfully undertake