I've been using Evernote since March 2010, if the date of my earliest note is to be trusted, and I use the web interface, the Mac desktop client and the iPhone version, and they all stay in sync beautifully. The CPD23 exercise asks us to look at this tool from the point of view of capturing webpages, and I do use it for this purpose, though I also use Instapaper. For me Evernote is useful on more or less any occasion when I want to make a note of anything. I use it for books I want to read, music I want to hear, films I'd like to see, library and swimming pool opening hours, checklists of things I need when going to a running race....so most of my content in Evernote is generated by me, not captured from the web. I've captured, as you can see, critical appraisal checklists, invaluable when practicing or teaching evidence-based medicine on the hoof. I find the ability to tag notes invaluable. I've just upgraded to Version 3.0.0 Beta 1, which includes support for Lion's favourites toolbar. I can't say that I no longer make paper notes, indeed I still feel naked if I don't have a paper notebook in my pocket and another one in my briefcase. I haven't used Evernote's collaborative tools to any great extent. I could, if I wanted, share notebooks with others, and view theirs in turn.
Update: I've just discovered that I can link my Evernote and Instapaper accounts. Hurrah!
The ninth thing, Google Calendar, is something I've used for a long time, though my main calendars live in Apple's iCal. It's only recently that iCal and Google Calendar have been able to speak to one another effectively. Now I can see Google calendars in iCal, such as the sailing club's calendar
or the CILIP in London calendar of CPD events
I haven't ever shared my Google calendar, though I have shared work calendars using Outlook, and, when at Sussex, the bizarre MeetingMaker. Since many Sussex staff are still living in the 1960s, MeetingMaker seemed to have been chosen as it was woven out hemp leaves and rattan, and powered not by electricty but by dollops of organic yoghourt.