I am planning to reach my adsense from $100 per month to $1000.So what all I need to do ? I will explain my plans. -> Start some blogs and advertise them using adwords. -> Do SEO to some sites. Any more ?
Nothing more you need, but this 2 works at recent? specially advertise with adwords & earn from adsense.
I would set your goals a little lower first, i.e. $100 to $250, then $250-$500, then $1,000, etc. It makes it a little more rewarding once you reach the other milestones, rather than being dissapointed every month from not getting your $1,000. Just my opinion though .
I think you need something more, like patience, looks like you think it will be fast but i doubt it. Basically what you said was right, i imagine that your websites already have quality content.
try to get good external links using any ways like article submission, Link building, directory submission etc. frequently update your blogs OR sites. It will sure help to you