The Arsenal forward had a tough time of it last season.
The 27-year-old endured a horrendous 2015-16 campaign with the Gunners, netting nine times in 47 appearances in all competitions.
As a result, Walcott, who started last season as Arsenal's first-choice striker, was omitted by then-England boss Roy Hodgson for a Euro 2016 spot.
But the winger-turned-striker has had a full summer under his belt to iron out the creases in his game, and there was an improvement after scoring in Sunday's 3-2 friendly win over Manchester City.
"It's all down to hard work," he said via ESPN. "I have to work hard in training, make sure I'm at it every day, and be the best on the pitch when I can be.
"That's what I want to do -- I want to get the best out of myself. And I think it will definitely happen this year."
Walcott will be hoping to start in Sunday's visit of Liverpool in the Premier League curtain raiser, though it remains to be seen where.
He has featured up front for Arsenal this season and on the wing, but he himself has revealed that he is happy enough to continue in a wide role if it leads to regular football, with Olivier Giroud considered their best number nine.
Walcott, at his best, is a major asset. The ex-Southampton product netted over 20 times from right midfield in the 2012-13 season, and Arsenal fans will be hoping to see more of that player during the season ahead.