How can I make long bus journeys more pleasant?

I travel 3-4 hours per day on the bus to get to/from work. I suffer from motion sickness (headache) and abdominal cramping from sitting so long and harsh braking. Does anyone have any tips for making the journey more endurable? I cannot read on the bus because of the headaches. Also suggestions on best seats on bus - it is a double-decker.

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).