We must live in the Present, because that is what life is. We look to the past in order to learn, we look to the future to set a course, but the Present is the only time you can make any change. Many people spend their lives living in the past or future, and when we do this we forget about the Present and miss opportunities we are presented with.
A great example of living in the present is Qui-Gon Jinn:
Qui-Gon: “Don’t center your anxieties Obi-Wan. Keep your concentration on the here and now where it belongs.
Obi-Wan: “But Master Yoda said I should be mindful of the future.”
Qui-Gon: “But not at the expense of the moment. Be mindful of the living Force, young Padawan.”
Some may argue that Qui-Gon made a mistake finding Anakin. Was finding Anakin the will of the Force? Did Qui-Gon make a mistake by training him against the wishes of the council? He was right that Anakin was strong, but of course Anakin turned to the dark side. Perhaps that was not Qui-Gon’s mistake, but Anakin’s himself.
Yoda is a Jedi who constantly looks to the future. Although Yoda did live in the present:
Yoda: “Ready are you? What know you of ready? For eight hundred years have I trained Jedi. My own counsel will I keep on who is to be trained… A Jedi must have the deepest commitment, the most serious mind. This one a long time have I watched. All his life as he looked away, to the future, to the horizon. Never his mind on where he was. Hmm? What he was doing. Hmm. Adventure. Heh. Excitement. Heh. A Jedi craves not these things. You are reckless.”
Meditate, concentrate and live. Let go of your feelings, your thoughts, your anxieties, to the point where you even forget yourself. Notice you are a part of everything, even without yourself.