component selection

I always had real hard time in selecting electronic components for my designs. what i am planning to do is to add the guidelines of how to select each components like..diode,transistors(BJT,Mosfet) and opamp,buffers,multiplexers,demultiplexers etc..etc..
I wrote one article on how to select op amps.

I have posted it at:

http://sreenivasa.kothamasu.googlepages.com/operationalamplifiers

May be some one finds it intresting. some E-books which i could find on net and which are free i have included in that website.
I will add a section on how to how to select any othe components. I want new to help new comers in the hardware field so that they wont face the problems i faced in my career. If any one wants to join me in this initiative it will be of great help too.