So I started a new job a few months back that includes significant business travel. I've already been on two domestic trips, have more upcoming this year, plus significant international travel in between. As I always seem to forget something (toiletries, PJs are only some minor things I've left behind), I would like to see what others experienced with business travel are keen to pack with them. 1 major question I have is what's a reasonable length of time to rely on carry-on? For my international trip (2-3 weeks in Asia) I'm expecting I'll need to check in luggage. However, I'm a very efficient packer so would like to get away with carry-on (no baggage claim, no chance of lost luggage) if I can. If I wind up checking in luggage, what's a good size for a bag just 1-2 sizes larger than carry-on? I plan on taking 2-3 suits plus will probably do some shopping. Nonetheless I don't want to have more than is absolutely necessary. I plan to do research myself on luggage and pain-free business travel but would like to see if any new ideas come up on here. Thanks for any input.