Buddha is often quoted on the topic of being "present." He, by all accounts, wasn't one to dwell on the past, saying poignantly that "there's only one moment for you to live, and that is the present moment." In other words, forget about the past, and just focus on being present in this moment.
My concern with this is that I have too many memories of being "present" in the past that remind me of how important it is to be present.
I remember, for example, pacing a friend during a 100 mile race. It was late at night, and it was starting to get pretty cold as we climbed toward the top of a mountain. I saw a glimpse of another runner's light above us. As I looked up, I noticed snowflakes falling gently from the sky. Yet, there were no clouds, just snowflakes. I remember being very present in that moment.
There was another time, during Western States 100, when I came into the Forest Hill aid station. I was really beat up, wondering how I was going to finish with 40 miles to go. Then I saw my family and crew, and my youngest daughter took my hand and walked with me for a while. I'll never forget that moment. Precious.
Yes, living in the present is indeed the best way to be "present." But remembering moments of clarity in the past, those precious seconds etched so vividly in our minds, are proof of presence, and not to be forgotten.