Firstly, well done on what you've achieved already.

Really, it's all about discipline, which if you're not careful can become very tedious.
X training is a good idea to keep things fresh. (Funny how an addicted roadie's idea of x training is to ride a MTB. haha).

When I used to do very heavy manual work, train on the bike like a madman and race every week my food consumption was frightening.... just to stay strong and healthy, but now I do a less demanding job I have cut back on my intake. It was a real battle to start with, but with DISCIPLINE it is achievable.
Just remember that the Western world's idea of the size of a meal is SUPER SIZE.

Learn to understand what your body needs, not what you can stuff in there.

Feeling blue? Look around you, look at your loved ones, give a bit of love and you'll feel better.
Volunteer work makes you appreciate the blessed life you really have

Thus endeth the sermon.