Jotting down on a notepad is a bit old-fashioned, don't you think?
Ok, but how can we keep everything in mind, then? Easy (and fast): take a screenshot!
With the new WIKO smartphones featuring Android 6.0 Marshmallow, it's even easier:
• usual method > press VOLUME DOWN + POWER for a few seconds
• 2.0 method > swipe down with three fingers on your display.
In both case, you can decide whether to take a normal screenshot or the longer version.