My DLR experience with RideMax taught me these things.
1. Aside from RideMax, it is good to know park and people patterns. Some things are beyond RideMax like ride breakdowns or weather.
2. It is good to know FastPass thoroughly. That means knowing how inefficient it is (typically) to ride FP rides early in the morning thru standby when you could be riding non-FP rides with little or no lines.
3. It is good to know ride popularity on the non-FP rides so you know which ones to hit early morning or late at night (and conversely, to avoid mid-day)
4. It is good to know which rides make good afternoon "fillers" - like Tiki Room - never much of a line any time of day
5. It is good to get to the parks early and concentrate on rides for the first few hours
At WDW I have used TGM and related DLR experience to help me with all of the above. With the above as a good starting point, the rest follows:
6. If RideMax makes you more stressed than before, you should use it differently or not use it.
7. Follow RideMax more strictly in the early morning on rides that are harder to fit in.
8. Collect all the FastPasses you can - even when RideMax does not tell you to (e.g., BTMRR)
9. After the first 2-3 hours with RideMax, transition to a more relaxed pace and use the FastPasses you have collected.
10. After 2-3 hours continue to follow the RideMax itinerary if you want, or be more spontaneous. We never followed RideMax the whole day. We let it help us with early rides and then transitioned. My family is not too thrilled with a 10-hour structured experience, but they are willing to go commando for a few hours if it will save time in line later in the day. Plus they know we will make time after a few hours for shopping, characters, and unstructured time.
At WDW we are planning to use RideMax similarly. In fact, the most help it gave us was with MK. We will be fairly strict until about noon at MK, and then we will probably still do the same rides after that we had planned, but maybe in a different order.
Another thing that helped me on the MK itinerary was to eliminate afternoon fillers like Tiki Room and Hall of Presidents. We still plan to do these, but we did not have RideMax schedule them. When I did this, the itinerary looked much "cleaner" to me, and left a 4-5 hour break mid-day where we will insert afternoon fillers as we feel like it.