Graeme McDowell says he has "renewed belief" he can win more major championships after tying for second place at the US Open in San Francisco.
"The fact I came second and gave myself a chance of winning means I will take a huge number of positives from this week," said McDowell.
"I was nervous on the last two days but hit quality shots under pressure. I am very proud of how I played overall."
McDowell went into Sunday's final round joint top of the leaderboard with American Jim Furyk, but paid the penalty for a "disappointing" start to his final round.
"It was tough out there, I got off to a slow start and didn't give myself opportunities," he said.
"It was disappointing but I missed too many fairways and that is not ideal at the US Open.
"I thought I was in with a chance after birdies at the 11th and 12th, but then I hit a bad shot at 13 and bogeyed 14.
"At least the birdie at 17 gave me an opportunity going down the last, but in the end I fell just short.
"These tournaments are a bit like riding a rollercoaster - it hurts at the time and it's a bit scary but when you look back, you think 'that's pretty enjoyable, I'd like to do that again'.
"The crowd were fantastic, they really kept me going, I'm just disappointed I couldn't do it for them."
McDowell now lies fourth in the European Ryder Cup points list and has moved up to 11th in the world rankings.
"I'm excited about the Irish Open, and I guess there will be a little bit of expectation on me now," he added.