Still trying to do quite a bit of the "zone 2" training - so went for a three-hour ski tour yesterday, mostly in zone 2. I need to increase the volume (serious endurance athletes average at least eight hours a week of zone 2; elite athletes might do more as well as some at higher intensity).
Also trying to revive the "Wake Up 10s" - a varying thing I do in phases. Basically, 10 each of a few exercises, just to wake up the body. So currently it's 10 pushups, 10 pullups, 10 ab wheels, 10 single-leg squats each leg and 1 minute each foot of standing on one foot with my eyes closed.
The last one is a great way to wake up your body since pretty much every muscle up to your neck gets at least some activation, though obviously 90% in your lower leg. The goal is 1 minute without touching the other foot to the ground or opening your eyes.