That's a hard one right there, I'm bored all the time, so I guess live my life bored...
I WOULD just think about stuff in my head, like the meaning of life and stuff like that, but I've already wondered about such questions so much I've reached my answer to all of them, so that won't work, meaning I got nothing to do... Although when the boredom gets extra bad I may:
-Rummage around in my hard drives to find anything interesting to distract myself from the pointlessness of existence (got 35TBs worth of games, anime, mangas, movies, etc.)
-Bother practicing martial arts a bit
-Look stuff up in deep web to see if anything worthwhile is going on somewhere in the planet (not the good kind of stuff, more like illegal stuff)
-Lay in bed and stare at the ceiling
-Lay in bed and stare at the pillow
-Fap while doing the two aforementioned things
-etc....