There are a lot of ways to go about link building. It’s pretty well common knowledge now that reciprocal link building doesn’t work. But if you do it right, then you can get away with it.
What you don’t want to do is contact other website owners and bloggers and ask them for a reciprocal link. That’s so 2000, and it won’t get you very far in the search engines even if they agree.
A better way is to make a list of people in your niche who are doing things you like. Contact those people and tell them you’d like to help them out. Then ask them what they have that you can promote. And link to it. Link to it from your blog and promote it through social media. Don’t ask them to reciprocate. You’re just being a nice guy.
If you do that, most people will find a way to do something nice for you. They’ll share your links and link to you from their blogs.
People by nature want to reciprocate niceties. We’re hard wired that way. All you have to do is find a way to promote other people, then let them find the way to promote you. This kind of reciprocal link building works and won’t get you in trouble with the search engines.