1. Could you give me a minute?
2. (informal) Hang on a sec / Just a sec.
3. Hold on...
4. Let me see/think...
5. I'll be right with you.
6. Bear with me.
7. That'll have to wait.
8. Be patient.
9. Not so fast!
10. Hold your horses!
#9 and #10 are used for cautioning someone to wait and not make a bad decision or take reckless action.

Science Facts
Scientists have modified cockroaches, implanting electrodes in them to control their legs, and used them as living robots to carry cameras or explosives through tiny spaces.      .. More >>