Meditation technique to sharpen mind and get into deep meditation
This technique involves both walking and sitting. Mindful walking and sitting should be done for equal lengths of time. For example, in the monastery I would walk for an hour, and then would sit for an hour, and then I would again start walking, and after that - sitting (meditating), unless I would take a short break. If you are new to meditation, you should start walking and sitting for ten minutes only. Thus, you would walk for ten minutes, and then you would sit in meditation for ten minutes. Then you can gradually increase the time of your meditation, at five or ten-minute increments. Both walking and sitting practices involve quite a few steps. Firstly, I will describe how to do walking meditation.Walking meditation - the first part of the deep meditation technique
During the first few days you will have to only focus on the lifting and putting of your feet. You should lift your foot flat - without raising the heel off the ground first. When you lift your foot up, you should say in your mind "lifting", and when you put it down, you should say "putting". After a few more days, you should introduce one more movement. You should lift your foot ("lifting", then move it parallel to the ground (whilst saying "moving), and then put it down ("putting"). Again, the foot should be kept flat. After a few more days, another movement is introduced. You would need to first raise your heel off the ground ("raising"), then lift the whole foot off the ground ("lifting"), move it ("moving"), and then put it down ("putting"). After a few more days, another movement should be introduced. Before putting the foot down, you would have to first touch the ground with your toes ("touching"), and only then firmly put your whole foot down ("putting"). Finally, after a few more days, the final movement is introduced. After moving your foot parallel to the ground, you will have to lower it ("lowering"), then, as in the previous paragraph, put first the toes on the ground ("touching"), and then finally put the whole foot down ("putting"). Thus, you can see that the final walking meditation involves making six foot movements: "raising", "lifting", "moving", "lowering", "touching", "putting". You should continue walking in such a way throughout the duration of your walking meditation, always being mindful of each of the six movements of your feet.
If this technique is still not clear, please watch the video above as I explain this meditation technique step-by-step.
Sitting meditation - the second part of the deep meditation technique
When you finish walking, you need to straight away sit down to meditate. If you really need to take a break for some reason (like to use a bathroom), it should only take a few minutes long. You should sit in a comfortable posture, especially if you meditate for an hour or so. In that particular monastery the monks advise not to cross legs. They say that crossed legs are fine for short meditation, but if meditation is long, it cuts off blood supply and causes unnecessary discomfort. Thus, their most recommended posture looks like this:
Recommended posture for this meditation

First points to focus on - meditation technique

Next point sequence - body front

Next point sequence - body back
Conclusion
I hope I explained this technique clearly, and I hope you will try it. A monk told to our group that this technique works - otherwise people wouldn't donate to their temple after completing the meditation course. I experienced it personally - this technique, in a short period of time, deepened my meditation significantly, developed my spiritual skills and the mind became more aware. I hope it will produce the same results for you.
This is one of the monastery buildings where I learnt this technique.
Tq for the brief but succinct introduction of the techniques. May you be well and happy.
Hi Simona,
It sounds very similar to the zen way of meditation, zazen (sitting meditation) and kinhin (walking meditation).
How about breath meditation? Observing the sensation of inhalation and exhalation on the nosetril or nosetip.