cd ~ ssh-keygen -t dsa
(just hit return at any prompts, even if it asks for a password). Then:
scp ~/.ssh/id_dsa.pub YOURUSER@YOURSERVER.textdrive.com:~/.ssh/authorized_keys
And put in the password for your account when prompted. Next, add the following to ~/.ssh/config:
Host SOMESHORTCUT Port 22 User YOURUSER Hostname YOURSERVER.textdrive.com KeepAlive yes
Restart the local shell, and then whenever you want to login to your server, just type:
...and you'll zip right in.