I tend to assume that if something hasn't happened for a while that it is more likely. This is a gambler's fallacy.
If you roll dice a million times then the numbers that come up will resemble a bell curve with 7 being the most likely result, but past events don't predict future random events. The law of averages works because large samples hide short-term aberrations.
The exception might be when dealing with human choices that otherwise would be random. Some people might have tendencies to do or not do particular actions.