In the computer programming biz, there are a few ways to get your name in front of people. Writing technical articles is one way. MacTech is always looking for authors. They don't pay all that well, but you get your name in front of people. If you specialize in a single area, this will get people to think of you as an expert in that area.
Every little bit helps.
It's tough enough to find people to do work that many companies are looking in different ways. Do what you can to make sure they find your name when they're looking. Join a professional association. There aren't any good groups for Mac programming, but joining the ACM gets you a permanent email address with them and gets you their newsletter. Get protection for your data.