The signal chain on the virtual pedalboard flows from left to right.
While there are absolutely NO rules and you should do whatever you think sounds/functions best, a general guideline of effects chain order would look something like this:
- 
Fuzz
 - 
Dynamics/Pitch/Filter
 - 
Drive/Distortion/Boost
 - 
Amp/Cab
 - 
Modulation
 - 
Delay
 - 
Reverb