Just 24 hours from now, Roger Clemens will walk to the mound at Yankee Stadium. That part is like any other start.

What’s different is that when he walks off it a few hours later, Clemens may very well have achieved one of baseball’s greatest milestones.

Indeed, tomorrow Clemens goes for career win No. 300 – and everything is in place for a classic afternoon at the Stadium.

“I think the anxiety part’s over with because everybody’s in motion to get here,” Clemens said yesterday. “And the excitement will be there when I drive in my car to the Stadium [tomorrow].”

The only potential hurdles to Clemens’ start – the bone bruise on his right hand and the possible rainouts this weekend – have all but been cleared. Clemens said yesterday, “I feel fine,” and the Yankees were able to play their afternoon game against Toronto. Assuming the weather holds up today, Clemens is set to go tomorrow.

He’ll have plenty of company. Approximately 25 former teammates and between 50-55 family members are set to make the trip to The Bronx. His mother, Bess, is “on her way,” as are his three sisters. Clemens even joked that with his sisters’ shopping tendencies, “I think my credit card’s going to take a pretty good hit.”

Clemens, of course, is a self-affirmed creature of habit and his between-start routine is legendary for its rigidity. Despite the overwhelming hype, the Rocket insisted that “nothing will change.”

Not that it’s been easy to stay sane since getting No. 299 last Wednesday.

“It’s just more hectic,” he said. “My phone’s been non-stop. The emails. I’ve been trying to do a lot of things. I have people who can do that. But it’s more personal when I do it.

“But we’ve got everything in place. I think most of the people who come in know that once we have a dinner or two, it’ll be time for them to get around town on their own. They’ll have a ticket here and they’ll find a way to get here and we’ll go from there.”

According to Clemens, there may even be some surprise guest appearances. Asked whether that meant someone like Nolan Ryan, Clemens said, “I don’t know.” He said he hadn’t spoken to his Texas mate.

Of course, with more people in attendance for him – like, say, 75 friends and family members – comes more pressure. Even Clemens won’t deny that.

“They are showing up for a one-time deal,” he said. “So there is some heat on me there. I wish it was a situation where you play five innings and it counts, like Cal’s streak.”

“This is something he’s never done before,” Joe Torre said. “Hopefully he’ll be able to shut it out once the game starts, especially in the early going.”

Torre also said that his hope is for Clemens to be able to be on the mound for the final out, though that may be easier said than done. Clemens hasn’t had a complete game since 2000.

“Ideally we’d like him to pitch nine innings,” Torre said. “I think you’d have to consider the game first. The score could factor into it … If it makes sense, we’ll do whatever we can. But we’re not going to put him in jeopardy either.”

Torre noted that Clemens only threw 99 pitches on Wednesday, saying, “He should have a full tank.”