It's been a long time since you left school and you're tired after a long day's work. But you should keep learning new stuff, be at work or in your own time.
The skills you teach yourself are the most valuable as they're grown up competencies, not quick fixes like most students do, and correspond to a real experience, unlike students mostly theoretical language.
You don't have to be a hacker in your garage, but there's a lot you can do with a computer, a sheet of paper, or just someone to talk to.
Remember specific skills are rare and pay more, so keep learning!