Some of these aren't bad. I'd check out Zero to Superhero <a href="http://www.zerotosuperhero.com" rel="nofollow">http://www.zerotosuperhero.com</a> for some pretty cool bodyhacks (yes, it's $10 but for 247 pages I found some value there).
Nice but I find it troubling to give "bite your tongue" as advice. There are a lot more safer way to incite pain such as pinching your arms. Tongue biting?