On Thursday, Hillary Clinton took a break from fund-raising in Los Angeles to appear on “The Ellen DeGeneres Show.” On Friday, she will fly to Seattle for a private fund-raiser, and on Monday, Billy Crystal, along with Matthew Broderick and Lin-Manuel Miranda, will host a Broadway-themed donor soiree on Mrs. Clinton’s behalf.

With Donald J. Trump plunging in the polls amid new allegations of sexual assault and the continuing furor over the “Access Hollywood” recording, what Mrs. Clinton will not do is anything that could rattle a race that has shifted solidly in her favor.

She enters the final stretch of the presidential campaign with cautious optimism about the outcome. Unlike most presidential candidates, who spend the last weeks before Election Day holding a succession of big rallies, Mrs. Clinton seems to see no reason to pack her public schedule. After Thursday, the Democratic nominee had no public appearances scheduled for the rest of the week, and her campaign has not announced additional events before next Wednesday’s third debate with Mr. Trump, in Las Vegas.

Aides point to rallies in Florida, Colorado and Arizona this week and say Mrs. Clinton has spent her downtime preparing for the debates. They have criticized Mr. Trump for shunning debate preparation, to his detriment. But her relatively light schedule also signals a newfound confidence inside the campaign as Mrs. Clinton seeks to get out the vote among specific constituencies and avoid making any unforced errors.