Here are some apps that are great for those who chose going digital.
Evernote
(
www.evernote.com) is an amazing company who has been on the forefront of digital notebooks. They have some amazing features from merging the digital and paper worlds together (see their moleskine notebooks for more information) and give people the ability to take pictures of their handwritten notes and then being able to search those notes online.
Wunderlist
(
www.wunderlist.com) is great for managing your tasks. It is a free service that has apps everywhere and is not too overly complex to use. You also have the ability to collaborate with others on projects.
Mailbox
(www.mailboxapp.com) merges email and tasks together into a wonderful interface that helps people get to a Zero Inbox on a daily basis. One of Mailbox's key features is the ability to "snooze" emails that you get for a later time. Currently, the app only works with gmail emails; but, is suppose to be integrating other email services in the near future.
VIPorbit
(
www.viporbit.com) is an app that helps people manage their contact lists in a very unique way: orbits. You have the ability to keep track of your communications with your contacts (email, phone calls) within the app as well. It is a very versatile app that lets you keep track of those "little things" that will help you at that next meeting.