The best method for starting is to begin questing, just like the majority of techniques. Simple missions such as The Restless Ghost, Priest in RuneScape gold Peril, Holy Grail, and Recruitment Drive will take you through the basics of Prayer ability. Once you have completed this, you will have to rely on farming bones in order to attain higher amounts of the Prayer.
An excellent source of Prayer experience earnings lies in Dragon Killing. The bones of Dragon Killers provide significant experience and don't require extremely high levels of stats. To eliminate Blue Dragons below the Taverley (in Taverley Dungeon) you won't require much resources whatsoever since they are able to be killed from a safe location. If you want to do this, be sure to use Magic since they're weak to this particular type of combat. Utilize giant eggs, rocks and columns to make Dragon stuck and end them with your spells.
Alternatively you might also kill Green Dragons north of the Graveyard in the Wilderness. Just bring an Anti-Dragon Shield, food and equipment. Do not bring anything that is precious to ensure that you don't forfeit a bank on Player Killers. You might also consider farming on Void Knight Equipment so that you're not likely to lose it losing it in low Wilderness. This is a fantastic outfit for Dragon Killing and a safe one to wear in this area.
Every bone you find must be sacrificed at the Chaos Altar, but it is not a safe method therefore, don't carry anything besides the bones that you'd like to buy runescape 3 gold sacrifice. It is among many of the Player Active zones on Runescape, and it is located in the 38th floor of Wilderness.