White said he matured and learned quite a bit while playing with Belleville of the American Hockey League last season, scoring 27 points (11 goals, 16 assists) in 47 games.
"Belleville taught me lessons on being a professional, about getting into the gym after games," White said. "I played a lot of games and it helped me understand the grind of playing a lot of games in a short period of time.
"My coach in Belleville last season was Kurt Kleinendorst, and his big thing was having fun because if you can stay positive through the dark times, I find that's when you play your best and get those lucky bounces."
He returned to the Senators a more complete skater this season, capable of playing big minutes in tough situations.
"He brings everything," Senators rookie left wing Brady Tkachuk said. "There's no weakness in his game. He seems to be going every shift and every second of every game, so to play with a guy like that has been a huge opportunity for myself and it's been great. He's been great for us all year."
Nicholas said gaining the trust of the Senators coaching staff was important to White's development and overall game.
"[The Senators] believe in Colin and now Colin believes in himself," Nicholas said. "Colin has poise with the puck because he has confidence with the puck. When the coach rewards you for hard work, that's big. Last year, he was up and down (to the AHL), so every time he was up, he was gripping the stick a little tighter because he wants to stay up. It's tough to gain confidence that way.
"Colin's ceiling is high, and with even more confidence he'll be unstoppable in terms of how far he'll be able to push his game."
White has been productive wherever coach Marc Crawford has placed him in the lineup, and he's expected to play a big role in the future of the Senators. He has four points (one goal, three assists) and has averaged 17:53 in ice time in his past four games playing third-line center.
"Colin and I do video work and skill work but most of this is Colin believing in himself that he can transfer what we do on the ice," Nicholas said. "I'm just fortunate to work with a guy like Colin but at the end of the day, Colin White is good because of him putting in the work. He's such a worker."