Do you mean you are making another website and link it to you main website? As others said, it is more advisable for you to just create a good blog and link it to your main website. The process of structuring a blog is a lot more easier than constructing another website. However, if you have set up your plan in creating a blog, be sure to have quality posts. Blog's life is not just centered into its appearance and how many posts are written in the blog itself, the very heart of the blog is the content of it. So for you to be able to use the blog as a bridge to your main website, quality content must be in it.