How do you design your maps?

[Andrez]

Do you think of the layout, or idea/theme, or draw a little mini map on a paper then after the layout is done add stuff to implement different tactical ideas? It would be very interesting to know!

I do! I'll post a map I drew on paper as soon as possible!

The problem is that even if I follow thousands of tutorials (I read Mr. Floppy's map design like two or three times) I can't get my ideas working on editing. Something goes wrong everytime, like too wide or tight tunnels, too long or too short ways, rooms with no ways or just 2 ways out...... :/