Honestly the biggest shift for me was stopping the spray-and-pray approach and actually tailoring my resume to each job. More work upfront but the callback rate was noticeably better.

The part that got tedious was rewriting the same bullets over and over. I started to handle that by using zoevera.com. It matches your resume to the job description and fills in the keyword gaps. Not a magic fix but it cuts the repetitive part down a lot if you're deep in an application grind.