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I second Astronomy 2010 (and each year thereafter) as it will give you all the info you need on planets, Moon and so much more. I also recommend Stellarium to give you a virtual planisphere that closely matches the real sky. I don't use my notebook at the telescope as even with a red (night sky) theme I find the display too bright continually ruining night vision for the evening.
If you do want to invest in some excellent observing software I recommend SkyTools 3 Pro as it has all you will ever need. I use this for planning an observing session. I then print out a list and any charts needed or use Sky Atlas 2000 charts as SkyTools3 can cross reference chart numbers for many popular other atlases.
The Pro version of SkyTools3 has the real time option should you want to connect your telescope to your PC plus it has a lot more stars than the basic version. In my opinion it is worth the extra.
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