I find it good practice to hand write, what at the time I deem very important, emails I'm not 100% certain I should send. Sleep on it and then read it the next day. If I still want to send it then I type it up and press Send.
Do watch out that your handwritten notes can be used as evidence if known about. A co-worker saying you had notes and you not being able to produce them might get a little sticky depending on the industry.