Kovacs Consulting conducted a survey to identify the essential 3 print Government Documents, the 3 Free Web-accessible Government Documents and the 3 Fee-Based Web-Accessible Government Document databases that you can't work without in answering reference questions

The survey was conducted with questions posted on various library listservs. 

The three lists are a helpful reminder of very useful information from the government.  I use most of the Fee-Based databases on a regular basis but simply forget about many of the others.  I printed out the list and will try to familiarize myself with the databases over the next few weeks and report back here.