WA plays its first away game of the tournament tomorrow when when it takes on Queensland at Drummoyne Oval in Sydney.
Bancroft said re-forming the successful partnerships of the Warriors first three games would be key to claiming another win in Game 4.
"I think the thing we've done really well so far is build partnerships and nothing changes in that regard," Bancroft said.
"Drummoyne Oval is very different to the WACA Ground; the outfield is slow and so it can be hard to score fours, but that's all part of the adaptation and if we have those partnerships we'll be in a good place.
"Winning makes a whole lot of difference to the way a team feels and the energy around the group, so it's nice to start off the way that we have, but there are still three more important games to go."
Bancroft, who scored a double-ton in county cricket leading into the One Day Cup competition, has performed well in the opening three games, but remains determined to improve.
The 24-year-old was unbeaten on 29 in WA's eight-wicket win over Tasmania and notched a half-century in the game against Victoria, but said he was still searching for a "really big score".
"Personally, I'm still looking for that really big score, but I feel like my frame of mind is really good when I walk out to the crease and that's the only thing I can control, so I'll continue to do that to give myself the best chance to score runs," he said.
"Queensland are a really strong team and they're coming off a win.
"I expect them to play pretty tough and have confidence, so it'll be two teams locking horns tomorrow and gunning for that win."
The Warriors start at 7.30 AWST Wednesday 11 October.
All JLT One-Day Cup games are streamed live and free at cricket.com.au