Dealing with lack of start motivation

I'll probably do a jam entry instead of compo since I still haven't really started beyond some keyboard controls and we're already over half way through the compo, time-wise. Led to an interesting question though - when you've got designers' block (or whatever you wanna call it) How do you deal with the lack of motivation to start?

I plan to download some stuff I'll need and disable my Internet for a bit to prevent distractions.