Start with the simplest, easiest, most obvious changes. Once you complete those, you'll get plenty of ideas for what to do next.
When I switched from game dev to PD for my primary career, I cleared the game programming books off my bookshelf and filled the shelves with PD books. I canceled my gaming industry magazine subscriptions. I deleted my web browser bookmarks to gaming sites and replaced them with a few PD links.
I kept looking around my life and asked, "What do I see that's incongruent with being a PD professional?" Then I replaced it with something congruent. It was actually a lot of fun. I felt like I was trying to cover up a crime scene by destroying the evidence and planting new evidence. The new evidence reinforced the new identity and kept me looking forward instead of backwards. Obviously it worked.
There's an old article on this concept here about how to use your environment to create these identity shifts: http://www.stevepavlina.com/blog/200...of-your-goals/
As I continue to progress with the MDE, I keep asking, "What do I see that's incongruent with being a millionaire?" I still see a lot of changes I need to make in this area, but one by one they're getting done.