A friend and former co-worker recently asked an interesting question - how do you plan and still stay in the present? This question reflects a common misunderstanding about "being present", an important aspect of traveling the Buddhist path. Being present or living in the now doesn't mean that you never reflect on and learn from the past nor does it mean that you eschew planning, set goals or aspire for better results in the future. Planning is a critical activity for most of us, particularly the ever growing population of knowledge workers.
What is not so skillful (a term Buddhists tend to prefer over "good") is planning during other activities such as execution or spending wasted mental cycles during planning. So, when setting aside a period of time to conduct a planning activity, do that activity fully and mindfully. To do so avoid the following:
Now, mindfulness does not come easy, especially for us Westerners who practically worship multi-tasking and always doing over being. For those who would like to explore mindfulness as a discipline, Jon Kabat-Zinn's Mindfulness for Beginners is an excellent resource.