There are a few things to do if you don't have the timeframe for extended reading/traveling around (or the proper mood for it).

(as some mentioned previously) dungeons via dungeon finder.

Completing fates / related weekly charlenges

Hunting log

Leves

All of those activites can be sort of conducted simultaneously, doing fates and hunts while in queue for dungeon.

this is all for lower leveling. as you gain higher level, several other activies can be unlocked