If I've jumped out of bed with some cool ideas still in my head it is the pen and paper sitting at all times on my desk. This is a habit from the days when it was taking 5 mins to boot into a working Windows 7 desktop and the ideas might slip away in that time.
After that I expand the ideas out and write them into markdown or text files and save them to a folder on my Google Drive. That way I know they are permanently backed up offsite immediately. It's free, available on every major platform and easy to copy around.
Finally, when time allows, I write them up properly into markdown and place them into the Git repo which the idea relates to. So now I have permanently offsite backed up thoughts / designs in a Git repo which I can diff at any time to see what changed and when.
I have Evernote and Google Notes and never use the damn things.