All those link building techniques that can give you safe and high quality backlinks are the most successful option for you. But some link building techniques are more popular, promising, and worthy than others. Here is the list:
Link roundups
Niche edits
Resource pages
Skyscraper technique
Competitors’ backlink analysis
Create evergreen, in-depth content
Unlinked brand mentions
Reach out to influencers
Fix broken links