My strategy is quite similar to you ...

For google, I just link my new site in one of my existing or build incoming links. I don't bother to submit to search engines but I do submit to link directories ...

And now, I am applying a new strategy to NOT spend too much time on the new website after having the site up and running and after the little link building ...

When I am done with that, I start thinking on a new website project ... The more the better ..

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Khairil Iszuddin Ismail