The Bantams take on Gianfranco Zola's Hornets in the second round of the Capital One Cup tomorrow night after securing back-to-back home wins in the league last week.
Fresh from their 5-1 mauling of AFC Wimbledon at the weekend, City were back at their Apperley Bridge training ground this Bank Holiday Monday to prepare for the challenge of Watford.
Given Watford's second-tier status, Zola's men will go into the tie as the bookies favourites but Parkin is hoping that City's recent good league form can help the Bantams give their hosts a run for their money.
"The key thing for us is the performance," Parkin told Bantams Player.
"We want to keep the momentum and high-morale within the camp going from Saturday.
"The main thing for us to help achieve that is to make sure we come out of the game, whether it be after 90 minutes or extra-time, with a very good performance under our belts."
Despite talk of City focusing on extracting a praiseworthy display out of Tuesday's tie, Parkin says that doesn't mean that the Bantams won't head south without genuine ambitions of progressing.
"It's an old saying, but winning is a good habit," added Parkin.
"It is important that we try and keep that habit within the four walls of this building (the Bantams' training ground).
"Confidence is a big thing in football, and we want to keep the confidence levels high.
"If we do get the right result that we are intending to achieve then great, but if not, we want to at least make sure that Watford have to play very well to beat us.
"They (Watford) have home advantage and there is two leagues between us, so they will be expected to win.
"But I think it is important that we put pressure on ourselves because we want to go there and play well and do well."
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