I sent a small deposit to Installation Company to get on their queue for dates to come and erect my solar PV array. I feel I ought to start my first spreadsheet to start accounting for every penny that goes out of or into this project. That's quite exciting. I've also arranged the finance for it and I have high expectations for the loan application.
One other thing I did was to mention it to a friend who might be the sort of guy who'd be interested in this.