What I tried to do, and what I advise you to do, is to try and adapt your habits to your vacation. Which steps of your routine can be done while you're on holidays?
You can drink a glass of water when you wake up. You can go for a short walk if you wake up early (I did it when I was out and it was great to wake up and explore). And you can have breakfast, right? That's 3 steps right there!
If you miss one, don't be too hard on yourself. Remember to relax 🙂