Mac OS X (10.7+) has a really neat new feature which allows you to send items directly from the Finder. It's very easy to use and can be a real time-saver. To use this feature, simply go to the Finder and open a new Finder window. Find the files that you want to send and select them.
Once you have selected the items you want to send, simply click the Share button that's located in the title bar of the Finder window.
You'll be presented with a list of options which can vary depending on the type of files that you've selected. Choosing Email will open a new email in the Mail program and attach the files, ready for sending. If you choose Message, a new message will be created in the Messages app with the files attached. If you've selected photos, as in the image above, you can post them directly to Facebook or Flickr.
Using these quick access features can really speed you up and help you to get the most from your Mac!