One of those “Wow, I didn’t know such a simple option existed!” tips, at least for me anyway.
Send an incoming call directly to voicemail by quickly double-clicking the top power button. I tried it and – unsurprisingly – works like a charm!
A great option when you’re in a meeting and realized that you didn’t turn off your ringer. It also saves you from having to wait through the standard ring cycle when you know it’s not a call you want to take.