Google updated its Submit Your Content page to make it more content central — a cumulative guide to various tools to get listed into Google as announced at newly launched Google Content Central Blog. If you're not sure where to start, "Get Started" lists the three steps we recommend all content partners take to begin sharing information with us. Alternatively, pick an industry that most accurately describes your organization.
The Content Types page is also a helpful way to see all the types of content that Google accepts and lists. Also check out the tools page for the many ways to be listed or listing tools that are provided by Google.