I want to revert my Macbook Pro 13" to earlier time?

Question

Yesterday I mistakenly opened Entourage in Office 2008 and clicked on the MYDAY option. I just wanted to see it but never used or enabled Entourage. To my surprise, every-time I restarted the computer the stupid MYDay icon would appear in my Dock. I couldn't get rid of it. I finally put Entourage in the trash but the MYDAY icon continued to appear. I searched on spotlight and found a, I believe, MYDAY .pist file and threw that in the trash, at which point the icon no longer showed up. However, since then I have encountered an electrical clicking noise that randomly occurs. After disk repairing, verifying, etc, and finding no problems, I clicked on the mute button. When mute is enabled, no random clicking sound. But when I turn mute off, occasionally I will hear the electrical click noise. It's not all the time, but from time to time.
If I can't find the cause or it doesn't just go away, I would like to revert my system to an earlier time, say the day before yesterday. I don't use Time Machine on this computer, but I have Time Machine backups on my Imac. What is the safest and most sure way to revert the system on this computer to an earlier time without at the same time maybe carrying over the problem that may have been caused by yesterday's missteps. I read that perhaps my computer is from time to time trying to connect to MyDay or Entourage, even though they are apparently gone.
Additionally, yesterday my wifi station malfunctioned and my airport was, without me knowing it, constantly scanning and trying to connect. I realized this because Iphoto would freeze up every-time I used it and I would have to force quit to get out of it. When I turned Airport off, the problem no longer occurred.
Perhaps one of these two malfunctions above have cause this slight electrical clicking sound to start up. It isn't occurring very often now, but it is still disturbing when it starts.
Any advice would be appreciated.

Answer 1

If you look below, I believe I heard this clicking sound and it was while in Safari. Something is said about not being able to find function pointer........etc. Perhaps this is not connected frequent log message. I was on my secure banking site at the time, but I've never had this problem before. The question is whether this is connected to my original description of the missteps that I thought led to the clicking. However, for example, there was no clicking at all for hours this morning. (I'm in France).
8/17/09 4:14:02 PM Mail[232] Error loading /Library/Contextual Menu Items/DocumentsToGoXCM.plugin/Contents/MacOS/DocumentsToGoXCM: dlopen(/Library/Contextual Menu Items/DocumentsToGoXCM.plugin/Contents/MacOS/DocumentsToGoXCM, 262): no suitable image found. Did find:
/Library/Contextual Menu Items/DocumentsToGoXCM.plugin/Contents/MacOS/DocumentsToGoXCM: unknown file type, first eight bytes: 0x4A 0x6F 0x79 0x21 0x70 0x65 0x66 0x66
8/17/09 4:14:02 PM Mail[232] Cannot find function pointer MyCMPluginFactory for factory EB982613-2188-11D6-BE4F-000A27E36620 in CFBundle/CFPlugIn 0x19000120 </Library/Contextual Menu Items/DocumentsToGoXCM.plugin> (not loaded)
8/17/09 4:25:49 PM Safari[231] Error loading /Library/Contextual Menu Items/DocumentsToGoXCM.plugin/Contents/MacOS/DocumentsToGoXCM: dlopen(/Library/Contextual Menu Items/DocumentsToGoXCM.plugin/Contents/MacOS/DocumentsToGoXCM, 262): no suitable image found. Did find:
/Library/Contextual Menu Items/DocumentsToGoXCM.plugin/Contents/MacOS/DocumentsToGoXCM: unknown file type, first eight bytes: 0x4A 0x6F 0x79 0x21 0x70 0x65 0x66 0x66
8/17/09 4:25:49 PM Safari[231] Cannot find function pointer MyCMPluginFactory for factory EB982613-2188-11D6-BE4F-000A27E36620 in CFBundle/CFPlugIn 0x176503a0 </Library/Contextual Menu Items/DocumentsToGoXCM.plugin> (not loaded)
8/17/09 4:32:31 PM Safari[249] Cannot find function pointer MyCMPluginFactory for factory EB982613-2188-11D6-BE4F-000A27E36620 in CFBundle/CFPlugIn 0x19862010 </Library/Contextual Menu Items/DocumentsToGoXCM.plugin> (not loaded)