Riddles
Riddles!
This topic is about short riddles, because not everyone likes to do the larger logical puzzles. If you do like those, then click here.
If you've guessed the riddle, you can immediately post another one yourself. Let's keep it going. 
I will start with this riddle:
What is easy to get into, but hard to get out of?
We're the measure of hunger and also of power.
Four of us will bring on the final hour.
Some gain wealth on account of our speed.
Once we are broken to man we will heed.
What are we?
On the charts, I remain number one;
This position cannot be undone.
If I burn, you may get
Just a little bit wet.
In a Zeppelin, I am no fun.
What am I?
My first will cover you all night long
My second might be your favorite song
My whole ensures the notes aren't played wrong
What am I?
I can be sorry, but not guilty,
I can be spooked, but not scared,
I can be sweet, but not friendly,
I can be flammable, but not burn.
What am I?
The doctor prescribes you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.
How long do you have before you run out of pills?
@DarkWolf
I think the answer is two hours as the person may well have just taken a pill out.
I always run but never walk. I often murmur but never talk. I have a bed but never sleep. I have a mouth but never eat. What am I?