Not everyone has the space to put up a noticeboard in their cubicle or home office. Instructables user makerboat came up with a cheap DIY bulletin board that can be mounted on a monitor.
It's pretty simple to make too. Grab a sheet of acrylic plastic and cut it to fit the edge and side of your monitor. The dimensions will depend upon how much weight your monitor can hold and how much space you have. Smooth the sides and edges with sandpaper. Apply adhesive Velcro tape on the back of the monitor and the plastic sheet, and stick to the two together.
There you have it, your own notice board, ready for you to stick family photos, Post-It notes and other reminders.
Transparent Monitor Noticeboard [Instructables]