First of all, having the right travel pillow can help you get some sleep during your traveling. From my experience, the travel pillow is designed to go around the back of your neck, supporting your head and it simply can`t fall off . It is comfortable, low profile, soft, easy to pack and affordable.

In my opinion, one of the successful examples, which has all of the mentioned characteristics, is the Ankaka T1 travel pillow. More about it, as well as about pillows in general, you can see for example here

https://www.amazon.com/s/ref=nb_sb_noss?url=me%3DA255NH5Y412UYU&field-keywords=travel+pillow