Warning: Use of undefined constant user_level - assumed 'user_level' (this will throw an Error in a future version of PHP) in /home/customer/www/wibbler.com/public_html/wp-content/plugins/ultimate_ga.php on line 524
http://www.dumblittleman.com/2007/05/sleep-adjustment-gain-10-days-per-year.html
Handy – and it turns out I do these tips already. Result.