"We had to take risks to get three points. It's important to be prepared and anticipate situations," said Paulo Sousa.
"And it's a better win because we had to overcome the problem with the penalties, so it will give us more power."
"I believe a lot in my players. I don't have doubts about them, they are getting better and more consistent," added Sousa.
"To make a big step you need players with qualities, different players, to get more alternatives. It's easier for a manager when you have more resources.
"I know what's needed and I think we can get it - but if we don't get it it's not a problem for me.
"Lee (Cook) has come back from an injury and is starting to get better physically while his skill and quality is always the same - fantastic.
"We need to use players with this kind of quality to achieve success."
Preston manager Alan Irvine was disappointed not to come away with at least a point.
"I think we deserved something," he said.
"In the first half QPR were the better team and I was praying for the whistle to come, but in the second half we were the better team and I thought we would go on and win."