The 28-year old impressed in Villa's eye-catching 3-1 opening day win at Arsenal and they now face their second game of the season earlier than their Premier League rivals due to Chelsea's involvement in the UEFA Super Cup.
Last season's loss, which triggered a run of eight games without a win, was the heaviest in Villa's history, but Vlaar says that Paul Lambert's side have learned from the experience.
"We all remember what happened last year so we want to put that to rest," he told the Birmingham Mail.
"If you can win at the Emirates, of course it is a great start. We want to do it again on Wednesday now.
"We learned a lot and we still have to learn a lot, but mentally we became a stronger team."
Villa narrowly avoided relegation last term, and Vlaar recognised the importance of Lambert having a harmonious squad at his disposal this time around.
"We need everybody, all 25 players, because it is a long season. The spirit is there in the group and that is the most important thing," he said.
"To come back from an early goal was very good and it was more than a win for us.
"You know when you play in eight days against Arsenal, Chelsea and Liverpool that it could be a little easier. But it is the start of the season and nobody really knows a lot about each other and what will happen from now."