I'm a productivity nut and I simply love Evernote, a free app for any of your devices, which allows you to save and recall information on any of your devices at will.
Evernote shines when you are able to create a structure to suit your workflows. Here is how I use it as a Customer Relationship marketing (CRM) tool.
If you sign up for a free or premium copy of Evernote then I'll send you some useful Evernote Templates for free.
Disclaimer: I'm an Evernote Certified Consultant and will receive a small commission on your premium membership.