United flew out to Spain on Monday ahead of Tuesday's Group A encounter in the knowledge that a win would take them to 10 points with two games remaining and secure their passage into the knock-out stages.
Sociedad lost to an injury-time goal to Bayer Leverkusen earlier in the competition, while an early own goal was their undoing at Old Trafford two weeks ago, but Moyes is focused on extending his side's seven-match unbeaten run.
"I certainly won't take anything for granted," he said.
"I have a lot of respect for Sociedad, and we will have to play well on Tuesday if we are going to get those 10 points which will get us over the line.
"But we have got ourselves in a good position in the group and we have to try to maintain that."
United's Champions League progress has been in marked contrast to their early-season Premier League struggles.
"There is nothing which we have done differently," Moyes said.
"Everything we're doing in this Champions League we're doing in the Premier League as well.
"The players are used to it. They are experienced at this level and that helps. I hope that continues."