Success was sweet for Puncheon having spent an unsuccessful loan spell with QPR last season.
"It's always good to get one against a former club, but the most important thing was getting three points," Puncheon said.
"We sort of got on the front foot and did what we've been doing in recent weeks. I thought we were solid, and that showed in the first half and the second half.
"We have always known as a group that we shouldn't be where we are.
"There have been games that haven't gone our way and games that have slipped through our hands, but we were determined not to do that from back-to-front and in [terms of] finishing off goals and that happened."