Since no one else has mentioned this, assuming you have a effects loop on your amp, the placement of effects before and after preamp matter, so here is my mods to the General rule of thumb list: >Guitar >Tuner >Pitch-based effects like harmonizers >Wah and filter effects >Modulation effects (chorus, flanger, phaser etc) >compressor or limiter >Distortions/Fuzzes/Overdrives >>>>AMP INPUT --------preamp <<<<Effect SEND >Noise gate >delay >Tremolo >>>>Effect RETURN >>>>>Amp reverb <<<speaker
EQs and Volume pedals can happen ANYWHERE (watch that the type of volume pedal is correct though)
Back to the OP questions: Of course I can pick what I like, but want to know chain order(s) others like to use and why. For instance, do you like: 1) the Tremolo before or after Delay/Echo? (Doesn't matter, question yourself if you turn on Tremolo and Delay at the same time) 2) Octave Up or Down before or after Distortion MXR M-115? Pitch should be the first thing after the guitar, period, so yes before 3) EQ before or after Boost/Overdrive? Again, EQ is applicable ANYWHERE. Remember the old rule of thumb, that EQ is the BEST WAY TO RUIN YOUR TONE (unless you use it lightly and carefully
That said, although I have a killer MFX box, and in the past had nearly every kind of stompbox available, I have to say I am in a purist cycle of just digging plugging my guitar into a tube amp and getting distortion and reverb there. And maybe a delay box in the efx loop. The rest of the effects are just tone suckers.