Seven Deadly Sins

From Andy Coggan:

Seven deadly sins...er, ways of determining your functional threshold power (roughly in
order of increasing certainty):

1) from inspection of a ride file.
2) from power distribution profile from multiple rides.
3) from blood lactate measurements (better or worse, depending on how it
is done).
4) based on normalized power from a hard ~1 h race.
5) using critical power testing and analysis.
6) from the power that you can routinely generate during long intervals
done in training.
7) from the average power during a ~1 h TT (the best predictor of
performance is performance itself).

Note the key words "hard", "routinely", and "average" in methods 4, 6,
and 7...