We hit 70° in Michigan today, so I was able to get some gooding putting practice in the fresh air. Focused on setting up square and getting the ball rolling over a spot ~6 inches in front of the ball.
I've also been putting the Stack Putting app through it's paces. It's proved to be addicting so far and gives much needed structure to my putting practice. The immediate feedback on my tendencies (missing left, not enough speed, etc) also helps to keep from mindlessly stroking putts without thinking about the bigger picture.