This is what I’ve learned from Kat, who learned this, looking back at the year. I am taking each of these to heart!
“Here are some big lessons of 2012!
1) You’ll never regret hanging out with friends and family, whether you’re walking around NYC, watching a movie, or getting a meal together.
2) It’s ok to NOT do something every second of the weekend. Spending time on the couch in your PJs watching bad TV is a perfectly legitimate use of time.
3.) Every work problem that is ever worried about gets resolved somehow, even if it seems monumentally bad at first.
4.) Worry less, enjoy life more.”
Jane's Lessons Learned 
I have come to these very same conclusions!
“It’s ok to NOT do something every second of the weekend. Spending time on the couch in your PJs watching bad TV is a perfectly legitimate use of time.”
Oh boy, some day this is going to sink into my head, and then rainy weekends will be less stressful.