Make use the AIDAS Copywriting Formula.

 This formula has been used for years as an outline for good copywriting. It stands for:
Grab Attention – this is the purpose of your headline. You have just about 10 seconds to accomplish this.
Strengthen Interest – Show your visitors immediate that you can meet their needs and solve their problems. Do this in a user-friendly way and they will stick around.
Stimulate Desire – Keep piling on benefit after benefit so that you can fan the flames of their desire to have your product or service.
Action – You must get them to take the appropriate action. This may be to click on a link, register, subscribe to your newsletter or go to your order page. Here is where you will want the action to be as easy and obvious as possible.
Satisfy them. – Provide what you promised in the timeframe you promised and even more than you promised. You want to aim to delight not just please your customers.

But use only one type of copywriting style on one site.

 Joseph Sugarman in his book “Advertising Secret of the Written Word: The Ultimate Resource on How to Write Powerful Advertising Copy” gives this suggested outline for writing advertising copy and general copywriting:

- Open strongly by eliciting interest and excitement
- Develop drama
- Explain why the product or service is different
- Explain how to use the product or service
- Elaborate on the unique benefits
- Justify the purchase
- Identify the lasting value
- Address after sale concerns
- Ask for the order.

The key here is not to mix whatever ‘structure’ you are going to use to frame your copy.