You've got it exactly right: START SIMPLE.
I myself am just starting back to the Beach; even though it's only been a matter of months for me, it's still a bit daunting. But I'm taking it one step at a time, instead of jumping straight into Phase 1. To start with I cleared ALL the junk out of my cupboards. Boy are my shelves BARE!
Then I made a list of all the meals I enjoyed on Phase 1, and a few I want to try. I was surprised at how many I came up with, including some that I've continued to make fairly often while off-plan. It made a great reminder that Phase 1 is not so different from how I eat now, and can be quite tasty!
Now I'm working on transitioning my fridge and freezer to totally Phase 1 zones, and reintroducing fresh veggies and plenty of water into my daily routine. At this rate I hope to be ready to start in a week or so - I figure I'm way less likely to fall off again if I take it slow and prepare myself.
Good luck with it, I'm sure you'll do great - you already have a roadmap of what it was like the first time, so it'll be smooth sailing! And thanks for asking about Supercharged by the way; I had wondered what the difference was. I may get it from the library to check out the Phase 2 transition stuff, since that was pretty hard for me before.