I don't keep a journal per se, but I use Evernote to write down ideas and save links to interesting articles and websites.

I do this for two reasons: - These notes may come in useful in my hobby projects, or at work. I have also been able to help my colleagues with information. - I sometimes feel overwhelmed by the number of open tabs in my browser. Saving links allows me to close the tab, knowing that if I ever need information on that topic again, I have some notes somewhere.

Evernote is not the perfect tool for this. Years ago I used Wiki On A Stick for this purpose because it allowed me to cross reference ideas and notes.