It's easy to send out your advertising left and right but it could be an immense waste of time.
I can think of some questions to ask yourself before sending your offer.

- What's your offer?
- Does it match your target?
- When do your readers open or see you offer?
- Does it reach your reader in the middle of the day when they
don't have the possibility to read it or see it?
- Your ad is too long?
- Does your URL work?
- Language and spelling. English is not my first language so I'm
always in danger here :-)