The 24-year-old and Langridge's men's doubles partnership began not long before last year's Championships where the pair went all the way to the final before suffering defeat.
Mills and Langridge lost in straight sets 24-22, 21-12 to Chris Adcock and Andy Ellis who, as a partnership, were to narrowly miss on a place at the London 2012 Olympics.
However they have now played almost a full year together, winning the Czech International title in September last year as well finishing as runner-up in the Bitburger Open.
And, with Langridge having contested five national finals with victory coming once, Mills is determined to make a second successive one and claim his first title.
"Considering we had only just been put together, reaching the final last year was pretty special. We have had a year to work on our game and I really think we have improved a lot," said Mills.
"Looking back on what we did at the nationals last season makes me really encouraged for this year. It was our first event together as a doubles partnership and we finished second.
"This year the focus is obviously to go and win it. We know we can be competitive and that's the main thing. We are getting better with every passing match.
"We know each other better and that is a huge bonus when you are trying to improve as a pair and that's another thing going our way.
"We've had a year and we've been picking up form along the way so I'm excited going into the competition that we can do well."
Just over a month after the English National Championships comes the Yonex All England Open in Birmingham, which last year saw Mills and Langridge fail to qualify for the main draw.
However, almost 12 months on, and Mills is determined to do so this year. He added: "It's such a big tournament that we really want to go there and give a good account of ourselves.
"We are improving with every game and every event we enter so I don't see why we can't do that and for me I like to focus solely on doubles rather than going in and out of singles as well."
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