How to best ensure local businesses are registered on google.

It's not that many steps but the ones that are required for helping rank your business and become registered on Google are quite important these include but are not limited to.
Optimizing for Google My Business.
Engaging do your customers via social media and posting regularly on your Google my business page.
Ensure your business name, address, and phone number are consistent online as well as add timing of operations.
Optimize online directories and citations.
Improve your internal linking structure in your website so that it runs smoothly in between its own pages

All great tips, thanks a ton for sharing. Doesn't Google have a tool to add your business too? So that it helped rank your site better?

I figure they would add a way to promote a new business, like a database or something.