If you run Windows, there are two desktop applications that are beyond handy and border on "essential"

The First is ChronosXP.
Download it from http://chronosxp.sourceforge.net/en/

This desktop app sits in your taskbar and alerts you regarding planetary hours configured for YOUR location. this is a VERY handy application and we at Tradwitch.com give it our highest recommendation.

the second is the LunaBar which also sits in your taskbar and provides you with easy access to complete and comprehensive Lunar calendar information.
download it here :
http://infra-azure.org/lunabar/