One other thing, if you've not already used it, is the Long Exposure Noise Reduction feature. Once you've closed the shutter at the end of the photo, the camera takes another exposure for the same duration, but with the shutter closed. Then it subtracts the sensor noise on the "black frame" from your exposure to eliminate the sensor noise.
It's great for long exposure night photos, but it does double the time for each shot.
"Red is gray and yellow white, but we decide which is right ....and which is an illusion"