canonical BX to-do list: Halflings

Halfling To-Do List
Level 1
Pal around with up to 39 fellow halfling roustabouts
Join a Basic NPC party
Serves as Retainer to a PC
Build a stronghold, found a new halfling community*
 
Level 2
Join a Basic NPC party
Serves as Retainer to a PC of at least the same level
Serve in the Militia of a halfling village
Lead a halfling village
Build a stronghold, found a new halfling community*
 
Level 3
Join a Basic NPC party
Join an Expert NPC party
Serves as Retainer to a PC of at least the same level
Serve as Retainer to a Fighter level 7 to 10
Lead a halfling village
Build a stronghold, found a new halfling community*

Level 4-6
Join an Expert NPC party
Serves as Retainer to a PC of at least the same level
Serve as Retainer to a Fighter level 7 to 10
Lead a halfling village
Build a stronghold, found a new halfling community

Level 7
Join an Expert NPC party
Serves as Retainer to a PC of at least the same level
Lead a halfling village
Build a stronghold, found a new halfling community

Level 8
Join an Expert NPC party
Serves as Retainer to a PC of at least the same level
Lead a halfling village
Build a stronghold, found a new halfling community
Become Sheriff

*By the book, halflings of any level that can afford it may start a new halfling community, but the option is introduced in the Expert rulebook.  I'd probably rule you need at least 4 levels to have the necessary prestige to found a new community.