Therefore, long time ago I started a checklist, and now I always run through it before leaving on a trip. It also saves me from worrying if I haven't forgotten something, and this list never failed. I'll share it, maybe others will find it useful. I won't include the common stuff such as "clothes" or "underwear" as that's what most people never forget at home. :)
Important:
- travel documents
- passport
- proof of medical insurance
- vaccination records if needed
- printed plane / bus / train tickets
- work permit if needed
- credit cards, discount cards
- laptop
- mobile phone, smart-phone (best if it has GPS & maps)
- charger(s) for phone, laptop, camera, mp3 player
- travel adapter(s)
- printed map(s)
- sunglasses
- sun hat, wind buff
- digital camera
- network cable
- headphones / earphones
- book(s)
- printed travel guide (I usually check for known scams and other warnings on Wikitravel)
- driving license
- napkins
- hair comb
- shampoo
- shaving kit (machine, cream, after shave)
- toothbrush kit (brush, floss, tooth paste)
- umbrella
- small deodorant, perfume
- agenda and a pen
- data cables (phone, camera)
- small towel
- cold pills, stomach pills (you might not find exact matches in the country you visit)
- antiseptic cream / liquid
- nail clippers, small scissors
- bathing suit
- flip-flops
- towel
- back-up shoes, shirt & trousers
- souvenirs
- plastic cutlery, cups
- game cards
Please comment / +1 this article if you forgot one of the items above on your last trip. ;)