Hello,
Below points one should remember when you are creating sites or doing SEO on it or writing content.
Panda was introduced because there were lots of SEO companies who were satisfying their clients with many backlinks strategies and Google search engine found that their is a lot of spammy things are happening due to this backlinks strategy so they introduced Panda to stop those spam, so that it won't affect search engines any more..
After Panda one should note the following points, so that Search engine will not penalize you.
1)Maintaining keywords denstity-- for 100 words content their should 5% keyword density, its strictly.
2) 1:3 should be outbound links
3) nofollow and dofollow ratio--- 1 dofollow and 5 nofollow links
4) length of your article-- prefer length not number of articles
5) Social media-- Its the must, google is indexing tweets as well so do stick with social media sites like facebook, twitter, etc.
What would you prefer, only suggest which are affective after PANDA update..