Clothing

7 t-shirts

1 long-sleeve shirt

2 pairs of shorts

1 pair of pants

1 swimsuit

7 pairs of underwear

7 pairs of socks

1 lightweight jacket

1 pair of sandals

1 pair of hiking shoes

Toiletries

Toothbrush

Toothpaste

Shampoo

Conditioner

Body wash

Sunscreen

Bug spray

Razor

Deodorant

Hairbrush

Makeup

Electronics

Phone

Charger

Camera

Memory cards

Portable charger

Headphones

Documents

Passport

Visa (if required)

Driver's license

Travel insurance information

Itinerary

Emergency contact information

Medical Supplies

Prescription medications

Over-the-counter medications (pain relievers, antihistamines, etc.)

First aid kit

Insect bite relief

Motion sickness medication

Miscellaneous

Reusable water bottle

Snacks

Travel guidebook

Spanish phrasebook

Cash and credit cards

Daypack

Sunglasses

Hat

Waterproof bag for electronics

Activities

Zip-lining gear

Snorkeling equipment

Hiking poles

Binoculars

Bird identification book

Transportation

Rental car reservation

Public transportation schedules

Taxi phone numbers

Map of Costa Rica

Accommodations

Hotel reservations

Contact information for accommodations

Confirmation emails or paperwork

Food and Drink

List of recommended restaurants

Dietary restrictions or preferences

Water purification tablets or filter

Emergency Preparedness

Emergency contact information

Travel insurance details

Copy of passport and other important documents

Local emergency numbers

International calling card

Leisure

Reading material

Games or playing cards

Music playlist

Travel journal

Local Customs and Etiquette

Dress code guidelines

Greeting customs

Tipping etiquette

Cultural do's and don'ts

Shopping

Souvenir budget

List of items to purchase

Bargaining tips

Departure

Check-out time at accommodations

Airport transportation arrangements

Packing checklist for return trip.