When I received a promotion in a previous job I accepted it on the condition that I'd have a pay review after 6 months because what they had offered me was a pittance over what I was earning, which was already well below industry average.

In those 6 months I put together figures and evidence that showed I was completing about 75% more work than a colleague who had left recently and was earning dramatically more than I was. I had a great rapport with our customers too. Obviously at that 6 month marker they said they can't give me a pay increase. From that point I just started coasting while looking for another job.

I always have the mentality of giving your best until it's not acknowledged. I'm also more open these days to telling my managers when I don't feel acknowledged in what I'm doing. Sadly 99% of the time they are middle management that can't actually do anything.