First thing you can do is start enjoying your rooted NC
Also, I have the following apps which I use most often than not. Not sure if your interests overlap with mine:
1. ezPDF - nice pdf viewer. There is RepliGo which is a bit expensive, but you can try for 15 mins and then get a refund if you don't like.
2. Root Explorer - nice way to side load apps. Tap and install.
3. Live Wallpapers - to sex up your NC screen.
4. Google Reader - nice way to browse through your RSS feeds
5. Aldiko - nice book reader app and you can get tons of free ebooks.
6. Back-up your apps!
I'm sure the ever useful SCION will chime in with few more.