Frequent tipster Leonid Nemirovsky shares a trick that gives us a quick way to create blocks in AutoCAD out of selected linework.
"First select the objects you want to be a block using Control+C. Then, once the objects are selected, place the anonymous block by pressing Control+Shift+V. Now every time you use Control+Shift+V the same block will appear where the crosshair is, ready to be placed into your drawing."
Notes from Cadalyst Tip Reviewer Brian Benton: This is a very useful trick. Making a block can be cumbersome at times. But if all of the linework is there, it is very easy to do. Without any command active, select the objects you want to be in the block. Press Control+C to copy the objects to the Windows clipboard. Instead of the normal paste procedure, press Control+Shift+V. This will paste the objects in the clipboard as a block. It will assign the block a name that is made up of an odd arrangement of letters and numbers. If you want to keep using that block, use the Rename command to change the name to something more memorable.