The National Map Viewer
The official U.S. government geodata portal. Heaps of data.
Guide to online, free spatial data
"Starting the Hunt" lists a lot of places to look for spatial data.
Michigan Center for Geographic Information Spatial Data
Lots of county and state data to check out.
GIS Data Depot
A mix of stuff, from global to local. Requires free registration
A GIS online trade mag. Keep up to date on industry buzz.
GIS Lounge Industry Press Releases
What's going on in the GIS Industry? Updated nearly every day.
ESRI-specific stuff, from technical tips to articles on GIS use in various industries.
GIS Jobs Clearinghouse
One of several (try Googling 'GIS Jobs') places where jobs are posted. 15-25 new every week.
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This page last modified January 12, 2015