Now I have found the source of this article by googling.
http://oedb.org/library/college-basi...king-knowledge


And I came across some other useful links like :
walking meditation
mnemonics etc.

There are so many key ideas in this article which are elaborated through some other articles.But the links of those articles are provided just in the original article as Saqib didn't do.

So ,I think providing the source is very important.