As far as a personal notebook that follows me everywhere, Evernote can't be beat. I have a folder for every sort of data imaginable, from camping checklists to

As far as a personal notebook that follows me everywhere, Evernote can't be beat. I have a folder for every sort of data imaginable, from camping checklists to common IOS commands and recipes I usually forget between times I need them. Taken as an indexed, searchable, omnipresent notebook, it really has become my second brain.