from my small installing history (still not finish with ALSA..), I think following Prepacks would have helped few months ago:
- wireless (ndiswrapper, wicd..)
- communication and exchanges (opera, links, midhight commander for ftp)
- hardware audit and setup (lspci, lshw, hdparm, gparted,..)
- office tiny (flume, gnumeric, leafpad, epdfview)
After the knowledge is growing and most of things works, I would keep only the extensions I know and which are good to me..