Video games, music, thinking, and Fallout (duhhhh).
The pantheistic mainstream asari religion is Siari, which translates roughly as "All is one." The faithful agree on certain core truths: the universe is a consciousness, every life within it is an aspect of the greater whole, and death is a merging of one's spiritual energy back into the greater universal consciousness. Siarists don't specifically believe in reincarnation; they believe that spiritual energy returned to the universal consciousness upon death will eventually be used to fill new mortal vessels.