Buddhists do pray!
Actualy, there are two missconceptions here.
Buddhists DO actualy pray in a sense. That is lay-followers do, in other words those who are not monks and devotees to the teaching of buddha often find spiritual refuge in some kind of converse with buddha and/or other key figures in buddhist lore, a form of prayer if you will. However this form of buddhism is considered as lower or slightly ineffective by the holders of the teaching as it does not offer a path to salvation or any real self-realization, however I think they do support it as it spawns faith in the buddhist teaching amongst the people and they also claim that by chanting certain 'prayers' you may be able to get through times of hardship and withstand the forces of evil.
As I said before, it isn't considered 'proper' buddhism to practice it solely through prayer. However in Tibet it is very common for monks to 'pray' at times, even to the extent of being a dayly thing, but in their case it is mostly to build faith and concentration.
Please also consider that the word prayer here and in what I am refering to within buddhist practice has a very different meaning to what we might consider prayer in the west, it usualy doesn't mean 'asking for help from higher forces' but rather the recitation of phrases that will help you personaly to make it through rough times no divine intervention involved.
Here is a practice involving recitation and contemplation of the Essence of Wisdom Sutra. It can be used to over come internal and external obstacles.
Going for refuge
I and all sentient beings, until we acheive enlightenment,
Go for refuge to Buddha, Dharma, and Samgha.
(3x)
Generating bodhichitta
Through the virtues I collect by giving and other perfections,
May I become a Buddha for the benefit of all
(3x)
Preliminaries
NAMO Guru, Teacher, Blessed One, and the Great Mother Prajnaparamita,
Surrounded by your Sons, the Buddhas of the ten directions and all Bodhisattavas;
I prostrate to this assembly, make offerings, and fo for refuge,
Please empower me with your blessings
(3x)
Reciting the Essence of Wisdom Sutra
(Sutra is as follows)
Avalokiteshvara Bodhisattva, when practicing deeply the Prajna Paramita, perceives that all five skandhas are empty and is saved from all suffering and distress.
"Sariputra, form does not differ from emptiness, emptiness does not differ from form. That which is form is emptiness; that which is emptiness, form. The same is true of feelings, perceptions, impulses, consciousness."
"Sariputra, all dharmas are marked with emptiness. They do not appear or disappear, are not tainted or pure, do not increase or decrease. Therefore, in emptiness, no forms, no feelings, perceptions, impulses, consciousness."
No eyes, no ears, no nose, no tongue, no body, no mind; no color, no sound, no taste, no touch, no object of mind, no realm of eyes, and so forth until no realm of mind consciousness. No ignorance and also no extinction of it, and so forth until no old age and death, and also no extinction of them. No suffering, no originations, no stopping, no path, no cognition. Also, no attainment, with nothing to attain.
The Bodhisattva depends of the Prajna Paramita, and his mind has no hindrance. Without any hindrance, no fears exist. Far apart from every perverted view, he dwells in Nirvana.
In the three worlds all Buddhas depend on Prajna Paramita, and attain Anuttara Samyak Sambodhi.
Therefore, know that Prajna Paramita is the great transcendent mantra, is the great bright mantra, is the utmost mantra, is the supreme mantra which is able to relieve all suffering an is true, not false. So proclaim the Prajna Paramita mantra, proclaim the mantra which says:
TAYATHA OM GATE GATE PARAGATE PARASAMGATE BODHI SÖHA
Reciting the mantra
TAYATHA OM GATE GATE PARAGATE PARASAMGATE BODHI SÖHA (3x, 7x, etc.)
Phew, here's a shorter one:
Requests to overcome hindrances
Great Mother Prajnaparamita, and all the Buddhas and Bodhisattvas of the ten directions, through the power of your blessings may these true words of mine be acheived. Just as before, when by contemplating the profound meaning of the perfection of wisdom and recting it's words, Indra overcame all the harm of maras, non-humans, and so forth, in the same way, by my contemplating the profound meaning of the perfection of wisdom and reciting its words,
May all the harm of maras, non-humans, and so forth be overcome (clap)
May they become non-existent (clap)
May they be pacified. (clap)
May they be thoroughly pacified. (clap)
These are taken from the book Heart of Wisdom by Geshe Kelsang Gyasto, the essence of wisdom sutra was cut and pasted from a website and differs slightly from the books version. There is no copyright on religious texts and practice.