Microsoft Dynamics CRM 2013 offers by default a “What’s New” landing page known as the Personal Wall. The “what’s new” page is a great place to start and is part of the social add-ins Microsoft introduced with CRM 2011.
Although the Personal Wall is great, I often like to start users on a custom dashboard:

Here’s an example of dashboard that launches to various entities and summarizes data specific to the user
A dashboard customized around the users day-to-day needs allows for users to quickly see and get to pertinent information. In my case, my team mainly focuses on the companies, projects and tasks assigned to us individually.