a new broom sweeps clean= bring in new personnel to make changes

new blood = new member to revive the group

new kid on the block = newest person in the group

turn over a new leaf = begin sg. fresh

break new ground = pioneer

brand new = completely new

a whole new ball game = completely different situation

ring in the new year = celebrate new year on December 31

be off to pastures new = leave job or home to try sg new

like a kid with a new toy = happily playing with sg.

neat as a new pin = tidy and clean