The Portuguese tactician was appointed at Stamford Bridge in the summer of 2011 as the most highly-rated young coach in Europe - having shone at Porto.
He was, however, to last just nine months before being shown the door by an unforgiving Roman Abramovich.
Villas-Boas wasted little time in returning to the Premier League when invited back by Spurs, and he feels he is better prepared to face the challenges of life in England second time around.
He told France Football: "What we are doing at Tottenham with my staff is a reaction to Chelsea, an echo to the mistakes we made.
"Not everything we did there was wrong, but we could have done better. It has not affected the way I am viewing football, but I admit I thought a lot about it.
"I should have been given an opportunity to go on, but I am aware that, considering the results, change is the only way to make an impact.
"I would never have gone to Chelsea if I was not absolutely convinced that I could have been a success there."