[hknmtt]

Firstly, do not take the notebook as something sacred. Especially if it is hardcover, you might see it as more valuable than a simple notebook you would use in school. It is not. You can buy a simple softcover with 20 sheets in it to give it a try and not feel like you are wasting "good notebook". But you will soon realize that it feels not worthy of your thoughts and time. You will want to write into something better to give it more meaning. Hence, go for something better right away. As for what to write, literally anything. What gained your attention during your day, what angered you, what was good, some philosophical topics you were pondering or some conclusions you came to during your day. Long or short, it does not matter. This is one of those things where "just do it" is the answer. After couple of days you will settle into it and start forming your own style of what to write, when, how... Personally I have added two aspects to my writing - I always put a date before I start writing if the date has changed form last entry and I draw a border round it to make it visually distinguishable. And I also highlight the main words that the entry is about by underscoring it. Like a hashtag on twitter. This allows me to browse pages and quickly see when i wrote and what i wrote about.

I have also ordered an A6 "pocket" notebook where I want to write one or two sentences or just key words per entry as condensed conclusions to my thoughts or sayings or quotes i heard or read. It should be this condensed book of knowledge and philosophy where long form is not exactly suitable for it.

PS: in my first month, i wrote a lot because there was a lot on my mind. But after a while your brains gets a bit quieter because you are doing this "exercise" and you will go through a short phase where you will be looking for something to write about. That might last a week or two until you settle into the habit and write only when you feel like it. I kinda miss writing when I have nothing to write about so sometimes i just write meaningless thoughts just for the sake of writing. Not all the time, just sometimes.