well dear i wud suggest you to work on contactnt now..its enough to have links submissions n all that so just go for proper content rest is ok almost
submit Do Fallow Forum posting and Do Fallow blog commenting as well it's will improve your SERPS in Google/Yahoo/MSN
Apart from methods you have mentioned go for article submission and blog commenting. These help you alot
I agree with the guys about link building, do submit seo optimized articles, forum posts, comments but don't spam