One missing point: preparation

I've been trying to get into a small program I need to write and am a bit stuck. After glancing at the (great) list in the article and realizing I can roughly control most of those elements, I think 'now why am I still stuck'? Oh I need to get this data structure from X, how to call that sub element from Y. Grunt work, yet details that easily fit into gaps between all the other various day to day distractions. So get all the junk together before that 12-36 hour marathon.