Keeping track of yout logfiles, realtime
When working with Sitecore, or other applications that utilize a logfile, its a great help to use an application that supports rolling logs. Rolling logs means that you can open the logfile in the application, and the lofile will automaticaly update, as informations are written to the logfile.

On of the best applications ive used for this purpuse is Wintail. Its free, and easy to use, simply open the lofile your application is using, and itll tell you whats happening realtime.

In development an debugging environments it essential, but it can also be installed on the production server, if you have remote desktop to server. Itll help you find exatly what is written to the log, when you do specific things on the site.

Also, check this Stack Overflow thread for more discussions on log tail applications