[HELP] Low competitive keyword and step by step guide Please

Hello friends

i'm regular visitor and silent reader of this amazing forum,

recently i have launched one money sites with low competition niche, wich has 300+ exact search search for main keyword, other 3 keyword does not have enough search.

Details :-
1. low competitive niche
2. 300+ monthly search for main keyword (other keyword dont have enough search)
3. google indexed pages 31
4. site has all unique articles and content.
5. on site seo is perfect as per all criteria.

Till yesterday my ranking was.
#11 for mail keyword
#9 keyword 2
#18 keyword 3
#22 keyword 4

but today i have seen a dramatic change in my ranking,

#29 for main keyword.
#6 keyword 2
#15 keyword 3
#19 keyword 4

here i noticed one more thing that my main page was ranked #11 before and now its #50+, one of inner page got ranked #29 for main keyword now.


All i did till today is :-
1. 500+ social book marking
2. 4 wiki post all unique articles
3. 2 blog post all unique articles.
4. 30 blog comments
5. 300+ forum profile links (tire 1) linked to my site
4. 1500+ forum profiles links (tire 2) linked to tire 1 profiles
5. 300 google+
6. 30 tweets


All i need to know if i'm doing something wrong, or is this normal,

also, ill appreciate if someone give me step by step guide to work on this NEW SITE with low competition keyword.
i dont want to get slapped by google, just caz of that i did everything manually.

PLEASE ADVISE AS PER YOUR EXPERIENCE, I know i'll get great ideas from EXPERTS here.


Thank You

no answer ? no one here to help me?