It's just a word document with what I've done/ who I've talked to as different points. Sometimess something will have more meat so I'll give that one bullet points to speak more about it. At the end of the day, it's not for anyone other than yourself so what you write whether formal or shorthand, is up to you. I type mine a little bit more formally, it helps me be more specific and ramble less of that makes sense. It also allows me to be able to pull it up and read almost word for word if someone asks " what did you get up to today"

Don't know if that's helpful at all, but that's how Ive been doing it!