whats the 'right' way to make a demo reels?

[elijah lucian]

http://www.evolucianmusic.com/listen.php

so im building my demo reels and im not sure if there are certain rules that one is supposed to follow when making them...
i have 2 there already...

are there certain lengths that work better or is there really no difference either way?

[nucleon]

Put your best work first, avoid long intros.

[Reflected]

hey elijah lucian i think you did pretty well....

[Labelwhore]

Nucleon's advice about avoiding long intros is ...

[vstmonger]

Hey, Nice job on that website....I don't think ...