I found MMM almost 3 months ago, and spent an entire weekend reading the articles from the beginning. I couldn't get enough, and loved the idea, but still caught myself reading certain articles and saying, "Well, I couldn't actually do XYZ, so I'll go to the next article." After a few dozen articles, I stopped myself and realized I was a super complainypants. It's not that I *couldn't* cancel cable, it was that I didn't *want* to. But then I did, and I haven't missed it at all. I didn't know anything about the lower cost cell phone plans, but then I did the research and switched. And I've kept a list of what I've done and the annual savings, and now it's a game to add to it and un-complainypants myself.
I think we all have things that just don't appeal to us (I still use my clothes dryer, for example), but we haven't eaten out since the first week of January, I've taken my son in the stroller to grocery shop 2 miles away, and I ran commuted to work yesterday for the first time (6 miles!). Every couple of weeks, I scroll back through the article list to see if there's something I missed in my first passes due to dismissing it without really challenging my "can't do it" thinking. The consumer sukka mentality is strong, so even when you're 100% committed, it creeps back in. I had a rough day at work yesterday, and my first instinct was to do take out (for the first time in almost 3 months). But then I stopped myself and thought, "The way to REALLY stick it to my boss is to save that $40 toward early retirement." And that felt way more powerful than paying too much for dinner.
Anyway, there's a ton of info on the blog, and so much here on the forums. If you can get your mind in the right place about it, it's pretty fun to play the MMM game!