Work experience is about gaining skills and contacts. It is a great way to 'feel out' your ideal job and boost your CV. Make the most of your time there and get involved in social events. This way you get to meet people from different parts of the company, see where you might fit in and use your networking skills.
Companies will seek exceptional individuals who can add value to their organisation. As a graduate you can bring useful skills, but you need to be able to present skills that are relevant to the role. In an interview, one way to find this out is to ask who are the good role models in the organisation and why? This way you can provide evidence of your suitability based on the reply.
You should customise your application for many reasons. It shows you have read and understood the job specification and gives the impression you are keen about the role. Relate your skills directly to the job specification - this will automatically give you a head start. For example you may have experience working behind a bar, this displays customer service skills which are required for many graduate positions.
CSR or Corporate Social Responsibility is a growing area that companies are addressing. To find out how active your potential employer is in the local community and how you can be involved, you can ask what development opportunities exist and how these contribute to the wider community.