Loads of coffee, stomach not too full, sleep well at night, listening to music, disable all IM programs and e-mail clients. Attacking a problem that captivates

Loads of coffee, stomach not too full, sleep well at night, listening to music, disable all IM programs and e-mail clients. Attacking a problem that captivates me to get started. Sometimes it helps to leave a bug that you know how to fix in the program so the next morning you have an easy thing to get started.