How do you stimulate sales

[temi]

Usually at this time of the year (Children on Holidays) and Easter approaching sales usually go down for webmasters services anyway.
What do you do to stimulate sales?

I figured this out a few years ago so I have another site with non webmaster related products which does well at this time of the year but those who depend on webmaster stuff only, how do they cope with the dip in revenue?

Here are things I think could stumulate sales:

- Special offer (buy one get one free)
- Email your customers
- Launch a new MUST have product

More suggestions?