
Tell everyone you leave behind you won’t be bringing them back any presents, if friends expect presents to be brought back, then perhaps they don’t deserve them. It is a business trip after all, you are working it's not a holiday and you can explain that.to them. Think of yourself for a change and your leisure time should be spent relaxing not shopping for presents to bring back all the time. If you do shop, just shopping for your most loved ones.
The last thing you want is to look tired after arriving at your destination and meeting potential business clients. If you take with you eye masks and earplugs you will get that much needed sleep en route without being disturbed or distracted. I find that wax earplugs are the best, you can find these in sports shops in the swimming section. These are really worth the little money they cost for the peace and quiet to sleep through. A blow-up pillow is also a very useful item to take with you and takes up very little space in your hand luggage, or even in your jacket pocket.

When you are staying in a hotel the alarms and wake-up calls just can't be relied upon. Before you set off have your own alarm system with you. It can be a small travel clock, a cheap digital watch with an alarm setting or even a stopwatch. If you have a pager check out the alarm system on that and get familiar with it. The last thing you want is to rush and forget things because third party alarm system fails you.

A very simple bit of advice is to take mainly dark clothing for the simple reason that unlike light coloured clothes they don't show up stains, wrinkles are disguised and drak clothing is always fashionable both in leisure and business.
Clothing includes footwear. The question is how many shoes do you need to take? The answer, two pairs, one for business one for casual. You will always be wearing one pair, so you only need pack one set. Don’t bother with slippers; just take a thick pair of socks to wear in hotels instead.

I hope these tips give your trip a much easier time and will improve your overall experience.