You can easily exclude posts form some selected categories to appear on your home page. This way you can create and exclude those categories which doesn’t belongs to your blog’s topic but you still want to blog about them occasionally or for using their URLs to share with other people etc.
PE Category Filter is a free WordPress plugin that allows you to exclude posts from selected categories from your home page while they still be reachable from other inner sections of your website.Simply install and activate the plugin then visit Dashboard -> Settings -> PECF Plugin page and exclude the categories you like to exclude.