Not sure that this follow along will be such exiting as with paid traffic, but hope it will inspire you 
Well, I'm building niche websites as my own traffic sources.
Niche: Mainstream
GEO: US
Number of websites: 4
Progress so far (I measure it by ranked keywords, usually, in my case 1 keyword = 0.3 - 1 click per month):
Jan: 239
Feb: 567
Mar: 1,035
April: 2,293
If everything will be good, hope to start monetizing them somewhere at... July.
Here is "middle" website:
Long
Well, I'm building niche websites as my own traffic sources.
Niche: Mainstream
GEO: US
Number of websites: 4
Progress so far (I measure it by ranked keywords, usually, in my case 1 keyword = 0.3 - 1 click per month):
Jan: 239
Feb: 567
Mar: 1,035
April: 2,293
If everything will be good, hope to start monetizing them somewhere at... July.
Here is "middle" website:
Long
