For instance to skip citations which:

1. already link arxiv or PubMed [those are good enough],
2. already have a DOI [those should be pointed to the archived copy via oadoi.org or doai.io],
3. would be linked to a resource one doesn't like (e.g. T166281).

For me it would be enough to have two regex filters on the HTML shown to me for the initial and final citation/link. This would allow me to click "skip" less times.