Selling/Protecting Invention

Hello Tek Syndicate,

 

I'm working on a new invention that will help many people using GPS and other things.

 

I don't really want to give the idea away but I just need advice?

 

How do I secure my invention, protect it, and eventually sell it to a company?

 

If it becomes popular, I know the big guys like google would love it.

 

Thanks for the help.

 

 

Patent protection?