Ditch the colors. Black, black, black. Jeans, T's, suits, socks.
Never EVER check your bag. Two suits are plenty--wear one with a casual shirt and workout shoes.
Forget Ziploc bags--if you wear contacts, use a smaller bottle. Use in-room shampoos.
Stay in the same hotel for two nights each week--and use their laundry service. This means five socks, five pairs of underwear, etc.
A roll-aboard suitcase case with a hook saves stress.
Before you go, test ALL batteries. You may not even need the charger.
Scan your paperwork into your computer or phone--it could come in handy.
May I add one thing--bring a few one hundred dollar bills--accepted everywhere. Cheerfully.