last plasma I bought I ran the slides at night and watched full screen tv during the day for the first week or so. I didn't think the slides were necessary, so I didn't want to go a full 4 days without using it, but I figured running them at night to help speed up the break in process couldn't hurt.
did a quick calibration before, basically just making sure it wasn't cranked up to the brightest settings. and then did the normal self calibration afterwards. I've had the TV for several years now without any problems. my plan is to probably do the same with whatever tv I end up buying this year too. I use the display as my computer monitor as well, so I definitely like the idea of speeding up the break in process, as that is one activity I actually will avoid for the first week at least.
Displays: Samsung PN64F8500/JVC X35
AVR: Pioneer VSX-1130K, 7.1/5.1.2 audio
Sources: HTPC(Enby), PS3, XBOX360, Wii
Control: Harmony One