Meditation
Meditation (Dyana or Iishvara prańidhána) is a very important part of Ananda Marga philosophy.
Procedure
Prabhat Ranjan Sarkar instructed not to meditate behind closed doors. He asked to gather strength by intuitional practices and unite against the immoralists.[1]
More info
According to Prabhat Ranjan Sarkar, while one is meditating, he does not see Parama Purusa, but Parama Purusa sees him or her.[2]