There are two steps, looking for similar patents, and reading them to decide if you'd be infringing. I can't offer any tips for the former, but for the latter

There are two steps, looking for similar patents, and reading them to decide if you'd be infringing. I can't offer any tips for the former, but for the latter you may want to skip ahead to the 'claims' section: this is the part with the legal meat in it.