[header] How to pack your carry on bag [title] Pick the right bag. [step] Make sure it's durable, easy to carry, and that it can hold all of your necessary items. More importantly, make sure it meets your airline's size requirements. 
Check your airlines faq to see the measurements of the largest bag you can bring. If you fly multiple different airlines, check the ones you fly most frequently and choose a size bag that will satisfy all the airlines requirements.