Well... This are the topics I like
(offtopic: what an ugly emoticon, haha)
Like @AnnaLandin said, there's no a right way to make a script. I'll tell my own experience. I write audiovisual screenplays and usually there is a standard format, an example:
JOHN walks into the kitchen. **A cat meows**
JOHN
Where are you, Kittie??
Since I began to study script writing for audiovisual, writing comic scripts became a nightmare to me. When I was in highschool I made comics without any script and it was more simple to me, but then one begins to study and PUF!! Bye bye spontaneity.
However, some time ago I tried to make comic script with format and then set the pages, without worrying about the frames (all like it was audiovsual). Then in the paper I separated with "[]" the frames and imagined the design of the page before drawing it. Example:
1.
[JOHN walks] [into the kitchen. **A cat meows**]
[ JOHN
Where are you, Kittie??]
2.
[JOHN sees KITTIE] [on the table].
I avoid to think in the structure of the page while I'm writing, that's why I don't write like:
FRAME 1: blahblhablah
FRAME 2: blahblahblah
By now, I'm back in drawing a comic without script, but the story allows me to be that free, maybe a more complex thread would force me to write one...