Click on Research for a list of broad topics. There are numerous reports, documents and news stories and even comparative tables addressing each state.
The NGA Center for Best Practices is comprises of five divisions focusing on broad policy areas: 1. Education, 2. Environment and Natural Resources, 3. Heath, 4. Homeland Security and Technology, and 5. Social, Economic and Workforce Programs. Click on divisions to find relevant content.
Part of the Pew Charitable Trusts, the Center on the States provides policy research for issues of importance to the states. Fantastic research content on states and state government.
Open States is a collection of tools that make it possible for citizens to track what is happening in their state's capitol by aggregating information from all 50 states, Washington, D.C., and Puerto Rico.
Published by the National Council of State Legislatures, this magazine reports on legislation in state governments. This link is for more recent years. Ebsco Mega File has online access going back over 10 years and other databases go back further.