Coming on slowly...

My Tesol Site is coming along... I've already got five articles for the site, and a blog with lots of really short stuff. But still no sales after two months.

I've noted that it has moved up the rankings on some searches... and it's well optimized (I hope!).

But no sales. So did I ...

pick the wrong products?
pick the wrong market?
develop the site incorrectly?

Mmm...?

Would love some advice.