Top tips/advice for travelling abroad with 1 yr old

Hi, can anyone share any top tips or advice for traveling abroad with a 1 year old. We’re going to the US for 2 weeks and will be travelling around quite a bit. We have some of the most more obvious items such as a compact buggy, compact travel cot and sunshade tent for the beach but wondered if there were any key must had items you’d recommend taking. Also if anyone has any tips on helping a baby adjust to the time difference that would be great to hear. Thanks in advance!