ladylou...
IMO TCOYF is fab.... i have read quite a bit, thought not all (yet) of it this week...
this is my 1st cycle of charting and studying CM, but have not been feeling my cervix...
anyway i knew last night that i was going to be ovulating today (and last night said to DH that i was pretty sure i was coming to my most fertile time)... i have just taken my 1st ever ovulation test (on 1st ever cycle) cause i was pretty certain i was ovulating now, and sure enough it was postitive 
the sticks instructions said i should have tested from day 11, but as i could tell i wouldnt be ovulating those days, because id read this book, i didnt test, as i decided not to waste any sticks until I thought i would be ovulating, other then when quite sure i wasnt!...
and as a direct result of reading this book, i got it right 1st time.
Am really shocked tbh, but for this reason i recommend it even more than i recommeded it earlier this week!!! 