The basics:
http://www.nature.com/news/pluto-fly-by-a-graphical-guide-to-the-historic-mission-1.17927
Detailed timeline of flyby events:
http://www.planetary.org/blogs/emily-lakdawalla/2015/06240556-what-to-expect-new-horizons-pluto.html
Where to follow progress:
- http://pluto.jhuapl.edu/
- http://www.nasa.gov/multimedia/nasatv/index.html (NASA TV)
- Twitter: #PlutoFlyBy, @NASANewHorizons, @NewHorizons2015
ETA: schedule of media events at http://www.nasa.gov/press-release/nasa-announces-updated-television-coverage-media-activities-for-pluto-flyby
Also, The Science Channel is going to do a flyby special on the evening of July 15th.
Party goodies:
http://pluto.jhuapl.edu/Participate/community/Plutopalooza-Toolkit.php
This is an awesome desktop app for Pluto and other NASA stuff: