How I can get my site on google at firstpage in 3 month?

BL is all that matter but the most matter is how to get a quality BL in a short span of time? That's a challenge right?

Backlinks are very important, but you need to get the right keywords.
'Air Conditioning' is a lot more competitive and a lot harder to get to the top than 'air conditioning birmingham' say.

Our company has two web design sites, and it has taken about 1 year to get even near to the top of google. It helps having a high page rank, and to get this you need to get as many backwards links with high page ranks.

Our company has two sites, \\link removed and \\link removed both which are optimising for web design. Because it is such a competitive phrase, we target web design rugby.

Same to you !

I think :

- submit directories
- exchanging links and having backlinks with high Page Rank sites
...

it depends on many fators .. for example .. tyoe of keyword .. at some keywords exist 500 000 000 results .. but at some only 1000 000 results . i think that could be possible only if you will make many good backlinks .. its really hard