How Much is Enough

If you are building links from Web 2.0 Blog, Article Directories and/or Wikis. How many posts/links do you do before you move on to a new network? I ask because isn't it better to have links from various sources instead from one.

Look at your competitors, there's the answer.

Web 2.0, article directories, wikis are not networks.

If you are referring to the amount of links you should have on those sites
before moving to another then it depends on your strategy.

For me i have list of different platforms of sites that i use and start from a to z
and a to z again and again until i reach my desired goal (top ranking)..