do not use the main road closest to the beach for vehicle travel (go over and around, i think it was lorna road) or if u are close enough u can walk.
try to bring as much cash initially with you as poss. limit your ATM transactions (la vela atms have 7 dollar transaction fees)
most of the bigger hotels have wet tshirt contests around noon. they aren't as packed as other places so it's easy to get good views.
the beach by the la vela stage starts getting packed around 2pm. the crowd/atmosphere there is good and i reccomend partying there if you're gonna be out during the day. la vela also doesn't charge cover during the day to get near the pool so as soon as you get there i'd suggest getting stamped, even if you're gonna be at the beach for a bit, as it will help with re-entry.
don't be nervous to talk to girls. any girl, at any time. there were times when we assumed since a girl was hot, she mustve been getting hit on constantly and thus, wouldn't care. waylander and i actually commented that we were surprised a girl came back to give me her number to hang out later after i'd said hi.
bring stimulants. beach/sun/partying wrecks your body. plus if you make it to PCB and you end up sleeping a bunch, you're lame. i would of definatly missed A LOT of things had i not brought.
have food in your room. our condo had a full kitchen so we had eggs, pancakes, deli meat, hot pockets, ect. if you don't have a fridge at least have some beef jerkey or crackers or pb&j materials.