I find meaning and joy in my life mostly by pursuing to *really* learn about the world around me and the way nature *really* works. Since everything that WTS teaches about the world and nature are completely false (from eschatology to creationism), it is most joyful when you grasp for the first time how everything around you moves.
Read science, learn about evolution; read politics, history, literature, poetry; pursue a graduate program (if possible). Pursue those joys that WT has stripped its members off.
Of course I also find joy in other aspects of life that WT had put a "forbidden" sign (of a more fleshly nature); however, I tread there with caution and moderation. We don't want to lose our health, nor give j-dubs reason to say "Look at that one: she/he left the Truth, and now is a failure/drunkard/addict/with STDs" etc.
In short, the things you can now do are a lot more than before, and a lot more meaningful.