01. Right mindfulness. Sati.
Powers of reference, or the right object. Remembering what it is we are mediating on and how to meditate on an object. For example with meditating on the breath, the mind may and will wander, remember though what it is we are meditating on so you are able to refocus and keep in and on breath. Keep calling to mind.
02. Clear concentration or Alertness. Sampajañña.
Sampajañña is he mental process by which one continuously monitors body and mind. its principal function is to note the occurrence of laxity and excitation of the mind, the aim is for clarity of consciousness or clear comprehension, i.e. right concentration. This has to be firmly in place in the mind before sending mindfulness out to refer to its object.
For example if mediating on the breath you may find a time when the mind is still and in place this is when you are alert this is right concentration.
So for example then this may lead to being clearly conscious in your going and coming; clearly conscious in looking forward and backward; clearly conscious in bending and stretching; clearly conscious in eating, drinking, chewing, and tasting; clearly conscious in discharging excrement and urine; clearly conscious in walking, standing, sitting, falling asleep and awakening; clearly conscious in speaking and in keeping silent.
So in all the your doing, be clearly conscious of your intention, of your advantage, of your duty, of the reality. Vigilantly retaining in the mind.
03. Ardency. Atappa.
Focused investigation, analyzing the object into its various aspects, at the right level of effort or enthusiasm and/or right level of quality. e.g. If meditating on the breath, ensure the level of breathing is appropriate to the exercise and and not uncomfortable or distracting.