I've only been playing a few days, but I got really interested when I found out that you can train your pets daily.
Yesterday I started by training up my creatus, and I would get them to stretch until they were up to 2.2 or so, and then train up one focused stat (either to balance them out and make them well-rounded, or to focus on one of their outlying strengths).
I found out today that the Flexibility points some-what roll over to the next day, and that a few of my pets that I had gotten up to 2.2 yesterday were back to 1.6 or 1.9, and so it didn't take very long to stretch them out. I spent most of my time and energy today stretching my pets (just cycling through the four stretches at level [1]) until they were at 'Supple', and then focusing on the training points that I wanted. I don't warm them up unless they're 'overweight' or at a high average.
So what do you guys do for Creatu training? What's your regimen, and what stat points are you focusing on most of your favourite pet?