ACCESSORIES ( WRIST WATCH/ BRACELET/RING)
A simple and classic styled silver or gold watch with a limited or less complicated features.
BELTS / SOCKS
A black belt (if you decide to go with the black color shoes) or brown belt for brown shoes. Also you should take with you a few pair of socks.
PAJAMAS /UNDERWEAR/ WORKOUT CLOTH
When packing for a business trip. It obvious you might have a stay over. Meaning you will need something to put on when it's bedtime (or you can go to bed with your business outfit on you… joking), so to avoid that, don't forget to carry pajamas or sleeping dress (if possible two pairs if your trip will involve more days). Another compulsory item to carry along with you is an underwear. Also, don't leave your workout outfit especially, if you are the workout type of person. For example, when I travel for a business trip, I carry along with me, my workout outfit. I love to workout and I do love running. I use that medium to explore the new environment.
NOTEBOOK/NOTEPAD/LAPTOP
If you are fortunate to own a laptop, that's great. You can carry it along but if you don't have a laptop, a notepad/tablet or notebook can serve almost serve the same purpose.
PHONE CHARGER/POWERBANK
When packing for a business trip, you should not forget to take along with you a phone charger and a power bank just in case you can't find an outlet to charge your phone. Just a backup source of power.