Maybe we are being a bit harsh to you Luckydot. You are asking for advice and we are brushing you off a bit brusquely. However, you must think about the question you are asking. There is no 'formula' to getting a distinction in any work. Your Masters diss is a very personal and relative piece of work and so there is no way we could advise you on how to improve it (if it needs improving) without reading it personally. I would say go to your Supervisor and follow their feedback. Also, do you ot have a marksheet that explains to you what you need to achieve to get a distinction? like analysis, critique, good refs etc? Can't you depend on how you have been doing so far?
Also, this is a PhD forum - to ask advice on your MA you ought to be on the Masters forum... They are going through it with you and perhaps can share their experiences in a more useful way?
All the best
Jayney