What are the best web 2.0 properties and free website builders?
Go to Clickbank or any affiliate networks. Find out what are their top selling products.
Key in "Product Name Review" in the search engine. See which Web 2.0 sites you often see ranking on the first page.
This means those web 2.0 sites rank well in Google at the time when you are conducting the research.
What is the best strategy to use with web 2.0 properties and free website builders?
Now that you know which web 2.0 sites are ranking well, leverage them for ranking. Use them to test out a niche before you go ahead and build your own website.
How to best make use of web 2.0 properties and free website builders to maximum highest quality backlinks and therefore traffic?
Assuming that your testing is profitable, in other words, the web 2.0 sites you build are ranking and brining in sales, you can then consider building your own website.
And now, you can use all those web 2.0 sites that are already ranking to link back to your website.