Simple ideas are often the best. Why not combine a clock with a note board? This Eco-Artware clock is made of blackboard material and has a little chalk holder along the bottom. Might be useful in the kitchen (like the image proposes) but I can imagine making more use out of the clock/chalkboard combination by putting certain time related notes on certain parts of the day. For example "write blog post" on the place where the hour hand hits 4 o'clock.