Take up running. Get in shape. Stay healthy, stay active. Start waking up at decent times. Start going to sleep at decent times. Stop procrastinating. Stop failing at everything. Stop feeling so inadequate. Stop feeling so hopeless. Maintain a functional relationship with my family. Make my mum proud. Pursue a normal hobby; collecting imported Dreamcasts is neither normal nor a hobby. Strive for a bright future. Fix my bad posture. Make friends. Ensure that the only girl I've ever loved starts to fully realise that she's the most precious, important thing to touch my life. Masturbate far less. Go outside far more.
...haha, just kidding. I'd probably kill myself.