Mahasi Sayadaw Noting Method (mostly as taught by Yuttadhammo Bhikku): Help with mindfulness during daily activities?
I'm not familiar with Yuttadhammo Bhikku, but from a short look at his teaching I believe the key is that one should not be noting things; one should be noting mind movements. For instance, looking at the discussion of vipassana on his website, he says this:


  The Four Foundations of Mindfulness are:
  
  
  Body: Noting the body while prostrating, walking, and sitting.
  Feelings: Noting pain as “pain”, happiness as “happy” and calm as
  “calm”.
  Mind: Noting thoughts about past or future – both good and bad – as
     “thinking”.
  Dhammas: Noting hindrances as:
  
  
  “liking”
  “disliking”
  “drowsiness”
  “distraction”
  “doubt”
  
  


Now, this is within the context of meditation, but notice the focus. He doesn't want you to notice (say) that you like the color of the head monk's robe; he wants you to notice that a feeling of 'liking' has arisen in you, without necessarily paying attention to the external focus of that feeling. You notice it arise, you notice it persist, you notice it fade...

Translate this to walking through your office: If you encounter a person whom you wish would like you, notice the desire to be liked rise in you. If you encounter a person you dislike, notice the disdain rise. If you have a moment of anxiety, notice the anxiety. You don't need to do anything other than notice. When you bring these large movements of the mind into conscious focus they will start to shift and dissolve of their own accord. Then you do it with more subtle mind-movements, and even more subtle ones, until your mind is perfectly calm and still.

Try to keep in mind that the people and things that you encounter do not cause the movements of your mind. You make them, when you form attachments to what these people and things represent to you, and those attachments drag through your mind like a rope pulled through water. Unless you notice the movement, you won't be able to see the attachment.