FOUR RIDDLES

1. Why is the word MISTRESS misplaced in the dictionary?
2. What is it that we both save and waste, both lose and find?

3)
Come up, we may go,
Go down, we're here to stay.

4. What is it that you don't want to give away, yet don't want to keep?

Answer:

1. It should be between MATTRESS and MISTER. 
2. Time
3. An anchor
4. Your bed (Keeping your bed means you're sick.)