You’ve probably felt the push recently to do away with everything that’s written — your address book, your calendar, even notes you take at meetings. But just think: How many people’s phone numbers can you recall off the top of your head? Do you know what your day holds in the way of meetings or to-dos — or even what the afternoon has on deck? If not, that might be because you’re storing much too much information electronically and not writing it down.

Handwriting events and addresses and other important information is a critical way for your brain to work and for your memory to exercise its “muscles.” These activities stoke the strength of critical brain-hand connections, and work out synapses that would otherwise not get attention. So what does handwriting do for you that an online calendar cannot? This graphic explains the critical importance of this activity.

How to Boost Your Productivity with a Desk Calendar [INFOGRAPHIC]