Gracie is right, it's learning to say NO every once in a while that's difficult to learn...
I think when anyone is suddenly free from work demands, they play....and play and play. Soon play can become work...really. Over time you learn to select what you want to really do and have fun with it....not select everything and then become bogged down with so much to do and no time for yourself.
When we were first retired I found we still arose early...heck, there was so much to do and settling in is fun. Now that more time has passed, sleeping a little later or lounging around with a cup of coffee and the paper happens more than it did when first here....but if one has an early tee time or class, well, the paper can wait...it's off to play...