When I'm home alone, I usually just pop in some DVD's for a little movie marathon before my parents get back home. Or I just do schoolwork ahead of time from everybody else to get a head start, and then just go on the computer.
If it's a boring night, I text people on my phone randomly to keep me occupied, lift weights, play video games, and then just take some short naps.
Being home alone and horny as fuck at the same time sucks so much ass though.