Many sites maintain curated resource or links pages in specific niches, and getting listed on the right ones remains a straightforward way to earn relevant links.
Find Pages That Fit Your Topic
Search for the kind of resource pages that already list content similar to yours, since they're the most likely to say yes.
Explain the Specific Value You Add
A generic "please add my link" request performs worse than one that explains exactly what your resource offers their readers.
Keep Your Own Resource Current
A resource page owner is more likely to add and keep your link if the page you're offering stays accurate and up to date over time.
Next step: Use the Link Analyzer to review the existing outbound links on a resource page before you pitch it.