The initial idioms of the letter S

serve out	serve right
serve someone right	serve time
serve to	serve under
serve up	serve with
serve the purpose	serve (one) the same sauce
serve (someone's) purpose	serve two masters
serve one right	service
serving	sesame
sesh	session
set	set (one's/someone's) back up
set (one's) cap at (someone)	set (one's) hand to
set (someone or something) (up) on a pedestal	set (something) at rest
set a high/low bar	Set a beggar on horseback, and he'll ride to t
set a spell	Set a thief to catch a thief
set a trap	set about