Meditation skill raises the passive mana regen rate and can be activated to enter a meditative trance which increases mana regen but is broken by speaking, moving, or taking any other action in game.

Raising Meditation: Meditation is a difficulty based skill. Deplete your mana pool by casting spells, equiping/unequiping magical hats, or drinking alcohol and then attempt to meditate. You will gain even without activating the skill if you are passively regenerating mana.

Gideon's Advice: Buy 30 skill from an NPC mage and then simply use Meditation while macroing Magery. This skill increases very easily on UOR and should hit GM long before Magery does.