I kind of keep track of TBR, but I'm not very good at it and I tend to break the rules all over the place because something comes along that I suddenly swerve for.
The only TBR list I keep pretty sacred is my indie read/reviews because I've already communicated with the authors and told them when I'm planning to read their books. I also publish the schedule on my site so I should at least make some effort to keep to it.
For ebooks I've owned I have custom tags for year for things I've decided to read in the year (or next year as the case may be). I tend to use Goodreads as well. But pretty badly.
Now the books I've read - that's a different story. Goodreads - and I do it pretty religiously.