Data analysis skills, both qualitative and quantitative. Data collection skills. Interviewing skills. Video and audio skills. People skills. Fundraising skills. Grantwriting skills. Administrative skills. Visualization skills (ability to make charts, graphs, maps, etc). Artistic skills. Writing skills.
And on and on. Not all skills are needed for all types of scholarship, but more and more these days, scholars are employing all kinds of methods to do their research.
This is actually a good question. I see so many apprentice scholars and they are lost because research involves so much more than they ever imagined. What really scares me is the ones I don’t see, who are all making it up as they go along.