Being bored :anapanasati meditation How to overcome feeling bored while doing anapanasati meditation ? I get this feeling after setting sati at the end of the nose and body is calmed .
Boredom is a sign of restlessness. If you're bored, you want to try to do something else. You're not contented with the present moment. Please read this essay on the five hindrances to meditation by Ajahn Brahmavamso.

However, if you're falling asleep or cannot focus, then that's sloth and torpor (quoted below from essay). Since you have already commented that sloth and torpor is the likely cause, we will focus on that.


  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.


You can use another essay entitled A Guided Meditation (quoted below) by Thanissaro Bhikkhu to help you with this problem.

From the above essay, you know that you must set a goal to generate energy that is, by generating interest. In the following quote, the author suggests to explore sensations in other parts of the body (otherwise you will doze off). Please read the whole essay to get the whole picture.


  If your mind wanders off, gently bring it right back. If it wanders
  off ten times, a hundred times, bring it back ten times, a hundred
  times. Don't give in. This quality is called ardency. In other words,
  as soon as you realize that the mind has slipped away, you bring it
  right back. You don't spend time aimlessly sniffing at the flowers,
  looking at the sky, or listening to the birds. You've got work to do:
  work in learning how to breathe comfortably, how to let the mind
  settle down in a good space here in the present moment.
  
  When the breath starts feeling comfortable, you can start exploring it
  in other areas of the body. If you simply stay with the comfortable
  breath in a narrow range, you'll tend to doze off. So consciously
  expand your awareness. A good place to focus first is right around the
  navel. Locate that part of the body in your awareness: where is it
  right now? Then notice: how does it feel there as you breathe in? How
  does it feel when you breathe out? Watch it for a couple of breaths,
  and notice if there's any sense of tension or tightness in that part
  of the body, either with the in-breath or with the out-breath. Is it
  tensing up as you breathe in? Are you holding onto the tension as you
  breathe out? Are you putting too much force on the out-breath? If you
  catch yourself doing any of these things, just relax. Think of that
  tension dissolving away in the sensation of the in-breath, the
  sensation of the out-breath. If you want, you can think of the breath
  energy coming into the body right there at the navel, working through
  any tension or tightness that you might feel there ...