Bookmarks (migrated there after Yahoo sold Delicio.us and never have regretted it, all my are now full clips so I don't have to worry if the URL goes stale) Research & notes. Tips tricks and other miscellania eg how to do conditional formatting in excel Recipes Lessons learnt Scans of business cards that I might need but don't want cluttering my contacts Scans of 1 page manuals eg the instructions that came with the combo lock on the side gate

All of that and other stuff :) I use most of the features, the only thing I wish it did have is a Delicious style tag cloud to make navigating those tags quicker, and a native Linux client.