What to do When I have ideas in my head

I will write them down Right Now !!
I will sketch-design them Right Now !!!

It happens a lot to me,
I'd have an idea to write or an idea of a design
then I'd be too lazy or too sleepy to write it down or to develop it.
and I'd think " Ohh.. I'll do it tomorrow or at night"

But what happens ?
Later......... you forgot about your ideas !!!
or if you don't forget, you get stuck......
You don't know what to do
You can't develop the idea
You have other things to do
So you end up not doing anything at all

Soooooooooooooo
whenever you have an idea
Write it down Right at that very Moment !!!
Develop it.... Do it Right Now !!