The Town boss, who was appointed on Monday, is keen to leave no stone unturned in preparation for games as they look to bounce back to League One.
This campaign will be spent in League Two, where Mellon last managed with Fleetwood Town in 2011. He left in December of that year with the team in a play-off place.
The 42-year-old Scot has held a keen interest in sports science since his playing days, working under a young Sam Allardyce at Blackpool.
He's due to finish his UEFA Pro Licence this summer and his classmates include acting Manchester United manager Ryan Giggs and Paul Ince.
Chief executive Matt Williams said: "He likes to go through the strengths and weaknesses of ourselves and the opposition in presentations to the players.
"We are on with that. He's big on fitness and strength conditioning, too. He's already given me a list of three fitness coaches that he wants the club to employ."
Williams has yet to start work since joining from Blackpool, where he was club secretary, and will first enjoy a short break on the Costa del Sol.
He said: "I am gutted to be going on holiday. I had to work a notice period, but I would have loved to have started as soon as they offered me the job.
"I have a pad at the side of the bed at home and I keep waking up in the middle of the night, thinking about things I want to do and scribbling things down."