Right now the ultimate goal is dungeon runs. Nothin' you can do there except rank up.

Get to 25 and run Toto-Rak.
Get to 45 and run Darkhold.

Other than that...

Explore the cities and do the sidequests, even though the rewards are meager.
Level a craft if you can stomach the tedium (I sure can't).
Wait 'til Thursday and get some swimsuits!

You also sound like you need a good linkshell. It gets damn boring without one.