Prayer is the humblest expression of seeking divine intervention by a believer in the karmic journey otherwise determined purely by the inflexible principles of karmic cause and effect. Prayer is acknowledged in every religion and faith.
The karmic journey of life is always fraught with too many uncertainties which do give rise to many insecurities resulting from unexpectedly challenging situations. This often leads to a situation where even the most confident amongst us would feel hopeless and frustrated. The power of prayer works miracles in these situations.
The moment one sits in prayer to invoke the divinity, the spiritual energies of the body and mind get activated. This is not something which happens purely at a psychological level, there are now scientific and medical researches to prove how the power of prayer ignites the release of certain kinds of hormones in the mind which are responsible for arresting the release of hormones that trigger depression and other negative feelings.
There is no particular form and method or even time for prayer. The prayers have to come straight from the heart as naturally as the cry of a child who seeks mother's attention when in distress. Words are not important and even not relevant to an extent. It is not the mental or physical energy which carries the prayers, it is the emotional energy that carries the prayers. All prayers are heard, no doubt about it.
Anybody and everybody can pray. It is not necessary that all prayers would be fully accepted, divine intervention is an exception and not the rule, yet no prayer would ever go completely unrewarded.