There are a few caveats to keep in mind when using symbolic links with Dropbox. First, if you're thinking of linking to your Applications folder to sync your applications between your Macs, don't. Besides Mac OS-specific issues that may arise, there's currently a known issue with Dropbox when syncing of hundreds of thousands of files. (Each Mac application is actually a bundle of many--even thousands--of files, so your Applications folder would easily trigger this issue.) Similarly, don't link to your iPhoto library. Second, don't link directly to a file; link only to folders. Linking to a file can result in the symlink being replaced by the file itself when syncing. Finally, and perhaps most important, if you later decide not to sync a linked folder, be sure to delete the symbolic link only from the computer on which it was created. If you delete the folder from a different computer, the next Dropbox sync will delete the linked data on the original computer, as well, even though the original data isn't located inside the Dropbox folder.

DVDLater: Like to plan your DVD rentals way in advance? Netflix makes it easy to browse movies by genre, new releases, and so on, but it doesn't catalog the movies now playing in theaters. DVDLater does, along with films that are coming soon or even just showing previews. For any release you want to save to your Netflix queue for later, just click Save to Queue. Presto--it lands in the Saved DVD section, ready for queuing when the movie releases on DVD.

Maybe the best part of Instagram is that its combination of simple social sharing, and effective, fun filters is encouraging more and more people to use their iPhone camera to capture and share the fun moments that take place around them daily. If your Twitter stream is anything like mine, you're seeing other people's Instagram moments every day.