__ passport
__ cash, credit card, travelers checks (small bills in good condition are easiest to use)
__ daypack
__ glasses
__ sun glasses
__ hat, good for sun protection
__ flashlight
__ plastic bags
__ sunscreen
__ alarm clock
__ watch
__ toiletries
__ prescription medicines - including malaria
__ personal first aid, Immodium AD
__ antiseptic wipes
__ camera, film, batteries, etc.
__ field guides - I will have several, but if you want your own
__ reading material
__ small towel or handkerchief
__ trip information, itinerary
__ tickets
__ insect repellant (25-35% deet)
__ flat casual shoes
__ hiking boots or sturdy walking shoes
__ water shoes or waterproof sandals
__ water bottle
__ binoculars
__ lightweight raingear
__ lightweight long pants
__ lightweight long sleeve shirt
__ shorts
__ T-shirts
__ sweatshirt, fleece, or light jacket for Monteverde
__ swimsuit
__ earplugs
__ mini sewing kit
__ address book for postcards
__ snorkel, fins, mask

What Not To Take?

__ too much, use the laundry services
__ jewelry, leave your good jewelry at home, buy local handicrafts
__ bulky/weighty items, find a substitute, pack clothes to layer