This is, indeed, a very exciting moment for you, but it also means that you have to create your dissertation. This will be one of the most difficult things that you ever made, but it will be worth it in the end. Most people fail to realize that you can't just do a great one immediately, you have to work for it, but the ones who do have the determination to do it will be glad to realize that it was well worth it since the end result exceeds everyone's expectation about this. So make sure that you have a clear and focused mind, some time to put into this, and try to follow these steps so you can get that good paper that you so badly desire.
Since the Ph.D. will be the end result of your years of studying, I am sure you have a few topics to choose from.So make sure that you choose a good one, one that will give them the good impression you need, one that makes you think about it even after you have finished presenting it. This is going to be a tricky job, depending on the subject you want to write about, but make sure that you take that extra time to think about and to find this awesome idea because the whole paper will depend on it.
Now this is obvious but it has to be mentioned. This is not a school essay, this is a dissertation and a good amount of research is definitely required so make sure that you take the time for this step as well. You already know that this is going to be a tricky job, since the amount of data we have access to these days is huge, but if you choose a good topic, and you like it, you will do this step with pleasure, which will make you work ten times faster, and it will make you more efficient. So gather that info and get ready to write.
Make sure that you present the whole idea in a new and unique way, one that hasn't been presented before, one that will make the reader think about that particular subject twice, and make them see things in a new way. This will guarantee that you get that good dissertation you need, the one that will stand out from the others and the one that will remain with everyone for a long time.
I believe that everything can be seen from different angles, so try to find a good one for your work as well. Giving everyone something fresh and bringing new ideas on the table is always a plus, no matter where you are, even if you are working as a manager or you are chatting with your friends at a coffee, so why not bring that same freshness to the school as well?
This is as important as everything else, simply because there is nothing worse than a great idea wrote poorly. Try to use a good vocabulary and be very specific about the aspects you present, don't leave gaps, try to get the point across very clearly, so everyone can see how serious you have been while doing this project. This will place the final piece that your masterpiece needs, and you can finally get the reward for your efforts.