Hi there,
My top three tips:
Firstly, keep the invention confidential until an effective patent application is filed. It sounds pretty basic, but you would be surprised how many people get it wrong. It is permissible to confidentially discuss your invention with others, and of course it's best to have some proof of that confidentiality. Ideally that proof would be in the form of a formal confidentiality agreement (aka Non-Disclosure Agreement).
Secondly, find a good patent attorney that you can work with. There is a world of difference between filing a patent application and filing an effective patent application. There is a lot more to getting a patent that filing a patent application - you will be starting a long term business relationship.
Thirdly, prepare a business plan. Even the best prepared patent application will not make you money by itself. In fact it will cost (a lot of) money. Take the time to think it through and make an informed investment decision before getting started.
Good luck.