The Owls narrowly missed out on promotion from the Championship.
Carlos Carvalhal's men reached the play-off final and only missed out on promotion after a stunning goal from Mohamed Diame handed Hull a 1-0 win.
And having finished in the top six despite starting the campaign with just one win in their opening seven league games, Lees explained that making a better start could be crucial to their hopes of going one better next term.
"We have shown we are a good side and we probably didn't get going for two or three months in the league," he told the Star.
"We will be better next year and improve over the summer.
"Hopefully we can get off to a flier and kick on from there."
While they will undoubtedly be wary of letting the disappointment of coming so close to promotion affect their form at the start of next season, the fact that they are much more settled this time around should benefit their chances of keeping up with the early pace-setters.
Carvalhal will not need time to instil his philosophy in the squad this year which will provide him with more opportunities to try and take the team to the next level, whether that be out on the training pitch or in the transfer market.
And with the confidence they would have unquestionably gained from this past season's efforts, a fast start next term would surely make the Owls one of the teams to catch in the promotion race.