Shinobi, thank you, very useful info.
Just a question.
The ND will show a DECEL point. Is this the point where the aircraft begins reducing speed to UP speed or is this the speed it wants FLAP 1?
90% of the time VNAV will work and can be trusted to bring you at the intercept at the right speed and altitude.
However there are times when it gets you there a bit too fast or with ATC shortcuts, a bit too high.
Of course people always forget to "update" the active waypoint from time to time as this also updates the wind info in the FMC and alas updates your path.
The same goes for updating the FORECAST page (especially the use of TAI).
But the FORECAST page is not of too great importance - it's a FORECAST after all.