To avoid toxic links, it's important to be mindful of the types of links you're building. Avoid spamming or using sponsored links, and make sure your backlinks come from reputable sites that are topically relevant to your niche. Make sure your backlinks aren't from non-indexed sites and avoid excessive backlinks built using the same anchor as your target keyword. You can use tools like SEMrush or Ahrefs to check the quality of your backlinks and monitor your SEO performance.