One query on Mindmapping.

If a main question has 25 sub points and how to draw lines and there are 5 main questions on a single page.

eg: The determinans of personal income?
1.point
2. ...25.

The determinans of national income?
1.point
2. ....25.

It seems clumpsy on the page and uneasy to read later.

Are there any other method of taking notes other than mindmaps.

while activating i find it difficult to take notes please suggest me what should i do to improve my note making skill. I have improved my other steps of photoreading.

thank you.