"I was always told by people when I was growing up that you have to take the rough with the smooth," he said.
"It was one of those things. That is in the past. I've got to look to the future."
England coach Fabio Capello left Carson out of the final two squads of the season for friendly internationals with the United States and Trinidad & Tobago but the player is hoping a fresh start will enable him to regain his place.
"I think I am good enough to get back in the England squad," he said.
"Hopefully I can settle down and get a bit of consistency and then I will be looking to get back in.
"No-one really said anything and I was left out of the squad at the end of the season but in fairness I didn't have the best couple of games for Villa before the squad was announced.
"That was fair enough. I took it on the chin. It just made me want to get back in the squad."
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