It would be very useful to be able to increment integers by simply putting variable++, and to add to a variable by going variableA += variableB (which would assign variableA + variableB to variableA).
Most other languages have this basic functionality so I think it should be built-in here too.
This is especially useful for string concatenation.
I'd also add the less used `*=` and `/=` just to round out the list. This sort of syntactic sugar is a big boon for developers. It saves a small amount each time, but it comes up very often.
I think we could add operator overloading to this request as well...