Wanderers were beaten 3-1 by the Cottagers at the Reebok Stadium on Saturday but Cahill is already focusing on Saturday's trip to The Hawthorns.
He told the club's official website: "We have been here before.
"The lads need to get together and next weekend becomes massively important once again.
"We'll go on a good run and then for no reason whatsoever we'll have a bad one.
"We know we have the players and we know we can bounce back."