Bode Plots - phase plotting by hand

[FrogPad]

My notes from lecture are somewhat deceiving. I have this table that is supposed to make plotting the phase portion of a Bode plot simple. I understand the magnitude portion, however I do not get what is being said for the phase portion. I am spending too much time on something that is supposed to be straightforward, so I'm just going to ask...

Could someone explain how to plot straight line approximations of the phase portion of a Bode plot to me? Or point me to a website that shows a straightforward method?

 

[FrogPad]

I found an amazing piece of MATLAB code that has helped me through my problem.

It can be found here:
http://www.swarthmore.edu/NatSci/echeeve1/Ref/LPSA/Bode/BodeFiles.html


It shows individual straight line approximations that would be drawn just like a human would, the summation of these straight lines, and the exact magnitude and phase on the plot. VERY NICE!