It's easy question.
I've never overslept in my life.
If you want get up early, you should go to bed early.
Now the sun rise up early and It's not cold.
So, to wake up early is easier than winter.
But if you aren't the aerly bird, you would better to prepare 2 alarms.
But I don't kike noisy sound.
It's like shouting and I feel like a beginning of a bad day.
So I wake up with my favorite music and feel rerax.