The more preparation you do before the interview, the more you'll get out of it:

• Write down all the questions that you want to ask, and bring the list along to the meeting.
• Get together all the relevant paperwork you'll need in your meeting. Try to get these papers in order, by organising the letters or documents by date, for example. This will make it easier for your solicitor to understand your situation and advise you more quickly.
• If you are planning to take someone with you, either to offer moral support or to help remember what's said, mention this when making the appointment.