I'd love to help, but I should be doing some freelancing work right now.
Some days it's harder than others, but if I have something really important to do, I do it first thing in the morning. For me that's the key - do it before you get distracted. Simple, but it's the only thing that works for sure. You can't do "some other little thing you've been meaning to do" or even check email beforehand (let alone Facebook or WP). The most important thing has to be the very first thing I do, straight after breakfast. Ideally I would even start it before breakfast and resume straight after.
Oh and yes, I pace. When I get some exciting idea I can't seem to process it sitting down. I jump up and pace up and down the house as I think about it. If anyone was watching me it would probably look really weird to them.