I get travel sickness if I travel not long after waking up, regardless of if I have breakfast or not. I'm usually fine if I travel after being awake for a while, like mid afternoon. Peculiar how it only affects me in the morning. Anyway, we usually get the early flights out, arrive at the Airport between 4am/5am.
I don't sleep on the last night of the holiday either. Would rather be tired than sick lol.
I used to get it too, mostly on cars. It's almost gone for a few years now, thank God. I still take some pills sometimes to be sure everything's going to be OK. I had awful times when I was younger.
Surprisingly I've never been sick on boats, even when I don't take them. I remember when we came back from England with my classmates 6 years ago (damn, already 6 years ago) : the sea was terrible, almost everybody was sick... except myself, which I found very strange
We went to the island Lokrum when we were in Dubrovnik, and the sea was quite choppy; I was almost sick. Felt terrible for the next couple of hours, and had to go back to the hotel and lay down for a while.