Mindfulness teacher Jon Kabat-Zinn has many words of wisdom, amongst them:  "Often our lives become so driven that we are moving through our moments to get to better ones at some later point.  We live to check things off our to do list, then fall into bed exhausted..."  We do this again and again don't we?  We can shift from doing mode to being mode by simply applying our attention and honing our awareness.  When our "doing" comes out of our simply "being", we are more effective, less exhausted and can enjoy the only moments we have:  the present moment.