PLO8 preflop

[Nate tha' Great]

A'ight, I'm giving PLO8 a try at the Party Poker $25 buy-in level. My postflop instincts actually seem to be okay, but I'm completely lost when it comes to preflop strategy. Can somebody give me some basic pointers, like the five most important preflop concepts? Please assume that I'm a retard when it comes to this stuff.

thanks,
Nate

EDIT: To clarify, I'm mainly thinking about limping versus raising decisions. I have a basic idea of what constitutes a playable O8B hand.