That was a good and detailed top ten tips list from the magazine section of the old site. Thanks for bringing it to our attention.
The top three preventable problems that I had on the NCC last year were the following: (and these problems would be exaggerated on the longer EC)
1. stinging eyes - bring some eye drops. Use appropriate lotion for above the eyes.
2. chaffing. lube up. small chaffing turns in to big problems.
3. water in amas. I was shocked to discover how much water weight I was carrying in my amas by the end of the race. Periodically stop and empty them.