If you participate in vector graphics forums, then you might have seen the question "Is there an Autosave feature in Adobe Illustrator?" and theorists would always say "no, there is not," more often advising to save the work through the Save and Save As commands.
These people are not familiar with these fluttering feelings of delight of a true artist, when vector is so nicely flexible and filled with the desired beauty, when you forget about the time and space, not even mentioning some trivial Shift + S. If you're one of those artists, I can teach you how to create an "Auto Save" on your own. This technique was developed by my friend Igor Tchernitsyn.
Create a new file (File > New) and name it in the open dialog box. Open the Action palette (Window > Action). Activate the Create New Set button and name it "Autosave."
Activate the Create New Action button and leave the name that is given by default as "Action 1."
Re-activate the Create New Action button and leave the name that is given by default as "Action 2."
Stop Action recording with the Stop Playing / Recording button.
Select "Action 1" and start action recording, by pressing the Begin Recording button.
Select "Action 2" and click on the Play Current Selection button.
Stop Action recording by pressing the Stop Playing / Recording button.
Select "Action 2," and turn off the Toggle Item in front of "Action 1," by removing it from the palette. Now start action recording by pressing the Begin Recording button.
Select "Action 1" and activate the Play Current Selection button.