[AntonioMQ]

In 'Mindfulness With Breathing : Getting Started' by Ajahn Buddhadasa, sati is refered to
in the notes as follows:

1. Sati is a key term in Buddhist meditation. It means "recall, recollection, awareness, attention, mindfulness." All of these concern the present and do not involve memory or thought.

In this article, the activity of sati is conveyed through a number of verbs: to fix, to note, to attend, to pay attention, to be aware, to experience. (Sati does not mean "to concentrate or focus.") Please study these various words and their meaning in each context, then you will have a correct understanding of sati, namely, what it is and how to use it to get free of dukkha.

http://www.suanmokkh.org/archive/aps/mwb-abc1.htm#1.