When should you start promoting your Blog

I often hear people asking when they should start promoting their blog.
How many posts are enough for a start?

Some people like to have some “meat” on their blog and would not start to promote a blog until they have something like 30 or 40 posts on it.

Others start promoting from the minute they finish the installation process (well, almost I guess…)

Personally I like to go with the second method.
I see promotion as a long and never-ending continues process.
It goes across all of the life span of the blog.
I would start early as possible even if all I got is 4 or 5 posts.

It is very important though, that these 4 or 5 posts are KILLERS because you want people to come back for more.

Promoting your Blog is a very long process and it takes time to see results, so start doing it early as possible would be my best way to go.

When do you start promoting a new blog?