I read like it's my job, so there's a fair bit of paperwork and tracking involved.
Back in the day when I saw a book I wanted to read I would just buy it, and leave it in a pile. Then I had kids, and ran out of space and money. Now I am a heavy library user.
My library has a holds limit 50 holds at a time, and I try my best to make it work for me. About 1/3 of it is taken up with books that have a long wait. My library is usually very well stocked, but if something's popular it's not unusual to wait 2-3 months. The other 2/3 is managed so as to try and read my TBR down.
I track my TBR in librarything. I pay a bit each year to maintain my 500+ book list, but to me it's worth it to have something I can sort and tag the way I want. I used to use Goodreads, but the cleaner look of librarything just suits me better.
When I finish a book I track it in three ways. I mark it read and give it a start rating on librarything. I also mark it read here - this isn't strictly necessary, but I like to be able to scroll through the cover images. Plus if someone is thinking about following me, I like to give them a snapshot of my reading life. Last, if there's any quotes I like from the book I write them down in my paper reading journal.
My journal isn't anything fancy. I use the free printable from Modern Mrs. Darcy. It's three hole punched, and enclosed in a cheap binder from target. I also use my journal to hold any print outs from reading challenges, and my immediate reading list. I pick about 10 books that I want to prioritize each season. The rest of my reading I pretty much leave up to chance and mood.
How do you track your reading?