I'm very influenced by my family's opinion, which I suppose is as it should be. I told them my Maths results (2 unit and Extension 1), they were pretty happy with it because my 3 unit mark had a noticeable improvement on my last one. Same for Physics, and I only lost 3 marks. So I'm sort of living in a little bubble of happiness/contentment right now. I didn't even feel this way when I first got the results!
Note: getting a good tutor is important, they can really help you get better marks.