Openings abound now but may go quickly, so it’s wise to submit applications soon. And don’t wear jeans and a T-shirt to the interview.

June 4, 2021, 9:00 a.m. ET

But while many employers are urgently hiring now, as vaccinations increase and coronavirus cases fall, that may not last indefinitely, so it’s wise to submit applications soon. “There are eight million people unemployed,” said Andy Challenger, a senior vice president at the outplacement firm Challenger, Gray & Christmas. “Get a jump on it.”

Some teenagers may be seeking their first job. Others may be rusty on job-search skills if they didn’t work last summer. So it’s wise to brush up on basic employment search etiquette.

Applying online has become the norm, but you may need to appear for an in-person interview before you are hired. Don’t take your parents along (that happens, Mr. Challenger says), and consider giving up the jeans and T-shirt.

Teenagers should keep in mind that they may be competing against more experienced people for job openings, as unemployed adults are also looking for work, Mr. Challenger said. So if you lack an employment history, emphasize other qualities: Flexibility is often an advantage for younger applicants, who may be able to accommodate a patchwork schedule that combines weekdays, evenings and weekends.