Survival was the aim following promotion and they are currently on 36 points - one more than the tally required to stay up last season.
He said: "It's a push for the next three points, and that's it at this stage.
"I'm not going to mug you off as for a newly-promoted side, 40 has always been a big number for everybody. Do I think we'll get there? Yes, of course, and when we do get there we can plan.
"I believe we will get those points, because of the attitude of the players and the performances of the team. After that, it is the next point or the next three points, because supporters don't want to see you take your foot off the gas.
"They pay their hard-earned money to come and watch you home and away and they want to see fully-committed performances because when you pull that shirt on they expect - and I expect it from my players every time they put that Sheffield United shirt on.
"It will be full tilt from us right until the end of the season, regardless of the competition and regardless of who we play."