Great question, Richard!
You sound exactly like me when I was planning for a trip in '06. ;-)
Since you have access to the three sources you mention, I would create my initial draft plan based on an appropriate touringplans plan, and then read a tourguidemike sample plan to understand the "why" of the attraction order (note: his plans tend to be a bit outdated, but his comments are still valuable). I'd then use ridemax to more specifically customize my plan to the likely timing of my day (arrival time, lunch time, etc.).
Once I have a draft plan, I would use the "Theme Park Touring, Tips, and Questions" forum of
www.tourguidemike.com to get feedback. The folks on that site are very knowledgeable, helpful, friendly, and do a great job of pushing-back if it looks like you are trying to do too many things. Post your draft plan, and you'll get lots of great advice.
Of course you can also get feedback here on the Moms Panel -- We'd be happy to give you feedback and suggestions if you write us with your draft plan for a park (one park per question - please!). Feel free to use ride abbreviations, so the question fits.
Lastly, please keep in mind three very important point in planning:
1) Get input from everyone you are traveling with. "Can't miss" attractions? What do they hope to do?
2) Don't try to fit it all in. You can't do everything at WDW in one trip. Less is more.
3) Be prepared that you'll need to change your plans "on the fly." An attraction might be down, you might spot a great character, etc. In general, the first 2 hours of the day are more important to have well planned (if you want to avoid lines) - after that you can (and should) be much more flexible about what you do.
Hope that helps!