The title should appear at the top of the poster in a very large font (36 pt or larger).
For text on the poster use a large font (24 pt or larger for important points – no text should be smaller than 18 pt).
Avoid longer text paragraphs, use item lists.
Use pictures and diagrams wherever possible.
Make use of explicit examples and provide sample structures.
If possible try to make the poster self-explanatory (it will be up for more than just the poster session).
The poster should cover the key points of your work (it need not attempt to include all the details).
Prepare a concise 5 or 10-minute presentation that you can give periodically during the poster session (details can be addressed as people ask back, possibly also after the poster session proper).
You may want to bring a handout for conference participants to take home (possibly with a more detailed text than what's on the poster).
The size of the poster panels is 1,20 (horizontally) x 1,50 (vertically). So, 5 rows X 5 columns of sheets (A4 or US letter size) should easily fit on the panels
You may want to pre-mount your poster on a coloured paperboard sheet.