The purpose of an abstract is to summarise in a systematic and formulaic manner the content of your dissertation. The abstract serves as a short-hand for the entire piece, indicating whether or not it would be worthwhile to read. Bear this purpose in mind when drafting your own abstract.
More than just an arbitrary label for naming your work, a dissertation title serves as the first summary of what your piece is all about. A good dissertation title must communicate the essence of your research project and give an accurate sense of what follows.
Publishing your dissertation as an article in an academic journal can look fabulous on your CV, particularly if you would like an academic career. If you have produced important material from your research than it can be a great help to others if you publish it. Your dissertation supervisor should be able to advise you on whether publication is appropriate for your dissertation writing.
Do not begin analysing the literature before clarifying in your own mind the research questions that will guide your dissertation. By formulating problems beforehand, you will avoid wasting hours in aimless reading. Know the issues of concern to you and consider the material through this lens alone.