What are the actions to be considered to become a saint?

well, living a holy life, this may sound cliche, but join the catholic church, we (catholics) are the only ones to recognize them and celebrate feast days, pray alot, especially a rosary, if you say a rosary in a state of grace you may get time off from purgatory, DO NOT COMMIT A MORTAL SIN.

Clarification:

Actually, many Protestant denominations do recognize many saints and the Anglican Church, on rare occasions, has 'canonized' a saint or two. The same can be said for the Orthodox churches. The Protestants, of course, do not recognize any saints canonized after the Protestant Revolt in the 16th century and the Orthodox after the Great Schism in 1054.