Rovers beat Championship side Peterborough 5-2 in the Carling Cup on Tuesday, bouncing back from their 5-0 drubbing at the hands of Chelsea on Saturday.
Salgado, who moved to Ewood Park during the summer on a free transfer, was pleased with the win over the Posh and hopes Blackburn can pick up a result away at Manchester United on Saturday.
"We have to keep the ball more in away games because of the way we have been giving it away to our opponents," he said. "It is very difficult to play against Chelsea and Arsenal if they always have the ball.
"But also, we have to not be frightened - we have to play and enjoy because in these types of games, we can only win.
"If we get out with a draw or a win from Old Trafford it will be great for us because normally, you are going to lose there.
"We have to enjoy ourselves against these teams, and I think now is a good time to get a result there."
The 34-year-old full-back scored his first goal for the club in Blackburn's win over Peterborough, and he said he is brimming with confidence.
"It is important for my confidence because I am learning to play in England and it is very different," he added.
"This was my second game in the Carling Cup. It was an important goal for me first of all, but also an important goal for the team.
"I feel well, life is perfect for me, but English football is different - it is quicker and you have to fight for every ball.
"In Spain we would normally keep the ball more. But I think in one more month,
I will have learned for sure."