Here's the primary board these days: Tuner > Overdrive > Reverb > Delay. The reverb and delay pedals each offer additional modulation that can be blended into the signal as well. You'll notice that the tuner pedal is placed a bit more off to the right of the others. This is so I'm less likely to hit it by accident when switching the overdrive on or off. Stepping on the tuner mutes the sound completely, which is a polite thing to do when tuning between numbers, but not so good partway through a song.
