The lists that I recommended below are based on my actual real-life experience while on outbound vacation. The suggestions are made based on what I felt as relevant, practical and convenient for those who wish to travel light and smart especially for a long vacation.
Shirts: Bring up to six shirts in a cotton/polyester blend; two long-sleeved collared shirts, two short-sleeved shirts and two singlets to be wore in-door when you are not going anywhere.
Pants: Bring three pairs; One lightweight cotton/linen blend with modest dress codes, lightweight pants-cum-shorts with zip-off legs and a pair of jeans for outdoor outings.
Shorts: Take two pairs; one with pockets and a beach swimsuit.
Underwear: Bring five light types as they dry quicker.
One pair of shoes: Black, cozy, light, cool and a good tread pair of Sneakers
Slippers: Casual and water proofed
Socks: Two pairs
Socks: Two pairs
Fast-drying Towel
Hat
Light luggage bag, small daypack and small pouch bag.
A light sleeping bag/portable jolly-bed and light hammock.
Camera
Mobile-phone & charger
Swiss Army/Leatherman knife.
Mobile-phone & charger
Swiss Army/Leatherman knife.
Tiny LED flashlight
Medical kit (Actifast, Uphamol & Yoko-Yoko)
Toiletries: Hair cream, Deodorant, Soap, Toothbrush, Toothpaste, Hair Trimmer, Shaver, Scissors & Mirror
Sun-block.
Sprayed Insect Repellent.