Alert
I watched my 6 year old daughter play today and learnt many a valuable lesson about life :).
Passion - Be completely passionate about what you are doing. She fights, colours, sings and explores with a passion.
Move on - When you feel you have no more to give then learn to move on. She effortlessly moved from one activity to another.
Listen to your body - If you are hungry, sleepy, thirsty: stop whatever you are doing and look after your needs. Boy, if my daughter needed something she definitely knows how to express herself!!
Absorption - Allow yourself to get completely involved, don't hold anything back. Time stood still for my daughter as she focused all her attention on her lego bricks, playhouse etc
Let go - The most important one of them all, learn to relinquish your attachments and bonds. At the end of play she tidied up and that was the end of it.....she was not going to even think about these objects till the next time she felt like playing....
I guess you never cease to learn...