Not an exhaustive list, but simply what works for me:
- Keep it short
- Put some images (use symbolic images, success, money)
- Call to action (buy now)
- Make it urgent (only 17 left)
- Give them the illusion that they make the choice
Expanding the last point, this is a very old sales technique. I will explain it exactly the way I learned it.
I worked for a real estate agent one summer, and he taught me that whenever he meets a client,
he sells the house
he wants to sell, and at the same time the customer thinks its his choice.
He judged what the customer needed by asking him questions, and then took him to his office, and showed him only 3 houses/options. The first two houses where close to what the customer wanted, but they had a minor bad point that made them unwanted (too far from school, etc).
The agent made sure the customer would know about the bad point, but he made it subtle. He took the customer to the houses, made him check everything out, and spent most of the day for those two. The customer was beginning to get tired and frustrated, and wanted to get over with it fast. The agent was sympathetic and tried to please the customer in any way possible, dying to help him with the ordeal.
Then, as soon as the buyer was close to giving up, the agent mumbled "well, there is this house, but I dont know..."
"what? what? tell me!"
"I can't, its already booked, sorry"
"at least show me!"
"Oh well, there is no harm in showing you"
Then the agent took the customer to the house, that was perfect for him, at the right price, having everything he wanted. He became excited, and wanted to close the deal. The agent was saying that it was already closed by another client, but he hadnt signed yet. But he would do the customer a favor, cause "he liked him, and wanted to help him", and he would call him tomorrow. Then, at 4 am, the agent phoned the client at home, and yelled excited "The other guy said he would consider it, so its free for now, but I dont know for how long!". And the customer was like "Have the papers ready first thing in the morning, I'm coming there to sign"
And everyone is happy.
Now, that real estate agent could sell refrigerators to Eskimos, and I know that not everyone can do that. But if you understand the concept, you can use that to generate sales. If not, go and make Greek souvlaki.