H1 & H2 tags as far as I am reading are very helpful in SEO. I wanted to know how many H2 tags can one have. I have around 7, is that too much ?
As long as it follows the semantic pattern. Having and H2 within another H2 would be incorrect and could possible cause problems. Generally, I use 2 or 3 H2's at max, and then I start to break down to H3's. But, it really depends on how long your page is. If you have 7 legitimate headers then you should be fine.
Mix H2 then H3, then H2 then H3. I would use structure like this : <H1></H1> <H2></H2> <H3></H3> <P></P> <H3></H3> <P></P> ... <H2></H2> <H3></H3> <P></P> <H3></H3> <P></P> ...