Keane clinched a move back to Spurs on deadline day after initially leaving White Hart Lane last summer to join Liverpool.
He never managed to establish himself in the Reds side but does not regret his decision to head to Anfield in the first place.
The Republic of Ireland international maintains that he tried his utmost to impress Rafa Benitez, although he does not want to dwell on the disappointment of his spell with Liverpool.
He told Sky Sports News: "Things happen for a reason. I went there and it didn't work out and now I'm back here.
"I never regret things I have done in football. I am back here now at a fantastic club with a fantastic manager.
"When you are in and out of the team it is never easy. You need to play regularly to get your sharpness but sometimes a manager just doesn't fancy you.
"I found it difficult to take to be left out of the squad but I worked every day in training and I have moved on now and I am looking forward to the challenge at Spurs.
"Sometimes the grass is not always greener on the other side and I have really enjoyed coming back.
"There is a great feel around the club and I am glad Harry gave me the opportunity to come back."
ConfidentTottenham are currently just one point above the relegation zone ahead of their derby clash with Arsenal on Sunday but Keane is confident of survival.
"We have a strong squad but we have to do it on the pitch, starting against Arsenal on Sunday," he urged.
"It is so close that if you get a couple of wins you are right back up there.
"I am really looking forward to putting that jersey on and hopefully getting three points on Sunday."
UnitKeane has been handed the captain's armband by Spurs manager Harry Redknapp and he hopes to inspire his team-mates to some improved performances.
"The reality is we are in a relegation fight. It doesn't matter how good a team you are, if you are down there it is going to be difficult," he admitted.
"It is clear to see the lads are low on confidence but it is up to me and the rest of the team to get the troops going.
"There is enough quality here but it is up to us to deliver. We need to stick together as a unit and get ourselves out of this situation."
Redknapp praiseRedknapp has once again expressed his delight at securing Keane and saluted the 28-year-old's leadership qualities.
"He is a fantastic player as well as being a terrific character. I have always loved the way he plays - the enthusiasm, the skill and everything he brings," said Redknapp.
"Even in training this week I have noticed a big difference, his enthusiasm rubs off on everyone else.
"He is going to be important for us.
"If people are not pulling their weight he will let them know, in a nice way. We are a very quiet team and I think that is important."