My 2018 goal will be to ride 7000 miles. After a two-year total hiatus from cycling I started riding again in late August of this year, and am currently sitting at 2270 miles for the year. I've been sick for the last two days so I got zero miles in yesterday, but I'm feeling a little better today and I'll be going out for a ride shortly. If I can finish the week very strong I may break 2500 miles for the year. Factoring in the low mileage I got in for that first month or two after I started riding again, I think 7000 is a reasonable goal.
I'm currently saving up some pennies in a separate account, and when it adds up to $833 I'll be buying the Quarq DFour power meter and installing it on my bike (actually need a little more than that since I'll need a new BB too). I'm very interesting in measuring my actual FTP, seeing real calorie burn measurements, etc. I think it will enhance my training and give me some new things to set goals for.