BGP Best Path Selection Mnemonic

From Wendell Odom’s CCNP ROUTE 642-902 Official Certification Guide:

Hint:
* Up to AS Path higher values win
* After AS Path lower values win


N WLLA OMNI

N = next hop reachability
W = weight
L = local preference
L = locally injected in the BGP process
A = AS path length

O = origin (igp < egp < incomplete)
M = MED
N = neighbor type (ebgp < ibgp)
I = IGP metric to BGP next-hop

And my own contribution to this list:

ORCA

O = Oldest route wins
R = Router-ID, lowest wins
C = Cluster list, shortest wins
A = Address of the BGP neighbor, lowest wins

Of course there are several options that can affect the order of the above process.
For details check on Cisco: BGP Best Path Selection Algorithm