You're almost done. We'll just create one (or more) users for your system. 9.0 2008-04-01
User Administration Adding a User for Daily Use

Working as root on a Unix/Linux system is dangerous and should be avoided as much as possible. Therefore it is strongly recommended to add a user for day-to-day use.

The groups the user is member of define what activities the user can perform. The following table lists a number of important groups you might wish to use:

audiobe able to access the audio devicescdrombe able to directly access optical devicesfloppybe able to directly access floppy devicesgamesbe able to play gamesportagebe able to use emerge --pretend as a normal userusbbe able to access USB devicesplugdev Be able to mount and use pluggable devices such as cameras and USB sticks video be able to access video capturing hardware and doing hardware acceleration wheelbe able to use su
Group Description

For instance, to create a user called john who is member of the wheel, users and audio groups, log in as root first (only root can create users) and run useradd: 

Login: root
Password: (Your root password)

# useradd -m -G users,wheel,audio -s /bin/bash john
# passwd john
Password: (Enter the password for john)
Re-enter password: (Re-enter the password to verify)

If a user ever needs to perform some task as root, they can use su - to temporarily receive root privileges. Another way is to use the sudo package which is, if correctly configured, very secure.

Disk Cleanup Removing tarballs

Now that you've finished installing Gentoo and rebooted, if everything has gone well, you can remove the downloaded stage3 tarball and Portage snapshot from your hard disk. Remember that they were downloaded to your / directory. 

# rm /stage3-*.tar.bz2*

# rm /portage-latest.tar.bz2*