I have so many ideas during a day that it's ... well, I don't even try to keep track of 'em.
There is however one big problem with them. They're gone too quickly.
It's most commonly because I don't get time to make a note of them.
There's also the problem of doing something of the few ideas that do stick around long enough for me to remember them after ten minutes. I'm not allowed to take the time to do anything about them while at work, and when I'm at home, there's other distractions.
The very very very few ideas that do get the time and energy for start-up ... usually gets scrapped without anybody else getting to know about them since they're not up to my expected quality. Because, you know, they should be as close to perfect from start and throughout the process as humanly possible.
A failure that nobody have seen and can not find ... is not a failure.
And I may not in any way, for any reason, fail.
At least, that's what grade-school taught me.