Does anyone have any tips of how to avoid getting sleepy when driving?
I can't say I have the answer, I can only tell you what happens to me when I find myself so tired I cannot keep my eyes open. I certainly try the common things, opening the windows or blasting the radio, sometimes it works. When it doesn't, and I realize, oh dear, this is really bad, then I have to pull over, whether to just rest for a while, or get out of the car and walk around. Or, stop and get a coffee somewhere, and stay there and drink it. I had one scary time when I actually closed my eyes for what I thought was an instant, only to see myself heading straight for a schoolbus. I also know there are pills out there, but I don't recommend that, and I don't say this from personal experience cause I don't take pills, but they have been known to work, supposedly you can ask any trucker.
I hope you find what works for you, other than making sure you don't drive when you are so tired, or, conversely, get so tired from driving.