How does an elder become an elder?
As others have pointed out be perpetually "available" for any...any assignment that comes your way particularly ones the other elders don't want to do like volunteering to take the FS group on public holidays. Appear eager to help but not ambitious. And the most important is to put your lips together and suck like your life depends upon it. It also helps to marry a theocratic "it" girl like the COBEs daughter or local pioneer.