How does one cultivate uplifted energy (paggaha)? In the sutta quoted here the Buddha recommends cultivating in equal measure concentration, equanimity and uplifted energy.

As far as I know, in order to develop concentration one focuses the mind on an immobile object like a kasina, and for developing equanimity one observes the rise and fall of the breath.

Similarly, what practice can one perform in order to cultivate uplifted energy? Would shraddha (pious faith) and belief in the dhamma qualify? Or does it refer to moment to moment mindfulness?

Is there a specific meditation practice recommended? 


  "A monk intent on heightened mind should attend periodically to three themes: He should attend periodically to the theme of concentration; he should attend periodically to the theme of uplifted energy; he should attend periodically to the theme of equanimity. If the monk intent on heightened mind were to attend solely to the theme of concentration, it is possible that his mind would tend to laziness. If he were to attend solely to the theme of uplifted energy, it is possible that his mind would tend to restlessness. If he were to attend solely to the theme of equanimity, it is possible that his mind would not be rightly concentrated for the ending of the fermentations. But when he attends periodically to the theme of concentration, attends periodically to the theme of uplifted energy, attends periodically to the theme of equanimity, his mind is pliant, malleable, luminous, &amp; not brittle. It is rightly centered for the stopping of the fermentations.


SOURCE: Nimitta Sutta: Themes - AN 3.100 (xi-xv) PTS: A i 255 Thai 3.103
From your quote, it sounds like the lack of uplifted energy is the hindrance of sloth and torpor, one of the five hindrances to practice. To quote Ajahn Brahmavamso:


  Sloth and torpor refers to that heaviness of body and dullness of mind
  which drag one down into disabling inertia and thick depression. The
  Lord Buddha compared it to being imprisoned in a cramped, dark cell,
  unable to move freely in the bright sunshine outside. In meditation,
  it causes weak and intermittent mindfulness which can even lead to
  falling asleep in meditation without even realising it!
  
  Sloth and torpor is overcome by rousing energy. Energy is always available but few know how to turn on the switch, as it were.
  Setting a goal, a reasonable goal, is a wise and effective way to generate energy, as is deliberately developing interest in the task at
  hand. A young child has a natural interest, and consequent energy,
  because its world is so new. Thus, if one can learn to look at one's
  life, or one's meditation, with a 'beginner's mind' one can see
  ever new angles and fresh possibilities which keep one distant from
  sloth and torpor, alive and energetic. Similarly, one can develop
  delight in whatever one is doing by training one's perception to see
  the beautiful in the ordinary, thereby generating the interest
  which avoids the half-death that is sloth and torpor.
  
  The mind has two main functions, 'doing' and 'knowing'. The way of
  meditation is to calm the 'doing' to complete tranquillity while
  maintaining the 'knowing'. Sloth and torpor occur when one carelessly
  calms both the 'doing' and the 'knowing', unable to distinguish
  between them.
  
  Sloth and torpor is a common problem which can creep up and smother
  one slowly. A skilful meditator keeps a sharp look-out for the
  first signs of sloth and torpor and is thus able to spot its approach
  and take evasive action before it's too late. Like coming to a fork in
  a road, one can take that mental path leading away from sloth and
  torpor. Sloth and torpor is an unpleasant state of body and mind, too
  stiff to leap into the bliss of Jhana and too blinded to spot any
  insights. In short, it is a complete waste of precious time.