I've noticed several people are inconsistent with their use of carb heat. The best procedure is to add carb heat before reducing power out of the green arc. This applies maximum available heat to the carb. When adding power, like for a go-around, the procedure is full throttle first followed by carb heat off. Refer to your POH.
Some aircraft are more likely to get carb ice than others and aircraft that use Auto fuel are more likely to get carb ice.
What are the initial indications of carb ice? Loss of RPM or MP.
Do you have a carb ice gage, How do you use that? Keep the needle out of the yellow.
Can you predict the chances of getting carb ice? Sure, refer to the carb ice probability chart.
I've had carb ice kill an engine three times in my career. Once in a C-150 running on auto gas and the second and third time in a Piper Apache flying IFR.