Have you ever left some unfinished document on your desktop just to forget it next morning?

Guess we all did, because our mind is trained to quickly scan for frequently used items on the desktop and omit others. Still that sounds like a very bad excuse when you realize that you forgot to do your job. That's why we created a new concept of organization of items on your computer.

Your Desk is a place to start your work, it should be a list of unfinished projects and documents and nothing else. So you can have always easy spot on of unfinished documents. Without a chance to miss that unfinished document of yesterday as it will appear right on top.
You should include any folder that you save your files from applications in Desk, in order to have an easy spot on what you are doing. By default Desk includes Windows desktop. Before version beta 4 it also included (My) Documents folder without subfolders of Documents folder, and it might be useful for many users, so you might consider adding it, and also adding all other folders where you start work on documents. You can edit this by choosing Items/Edit Items List when Desk is shown.
When you finish doing something, move that item away from the Desk. In most cases the easiest thing to do is to move it to the Archive, by selecting Archive command from Commands bar or context menu of item. You can define a different folder to be an archive for each folder in the Desk by editing Desk (Items\Edit Items List). You may have some other folders where you want to move your Desk items to, and if you pin them to Sidebar (by opening folder and choosing Items\Pin To Sidebar), they will be always available in both Sidebar and Archive button submenu, so moving them will be easy.
If you have some projects (that may contain several files), the best strategy is:
- create new folder for this project on Desk,
- create each new document of project on Desk and when it is completed move them to project folder,
- when project is completed use Archive command, or move it to other Sidebar folder.
If you edited Desk folder and still see items you have completed, it is time to clean them with Archive command or move to other folders, as this cannot be done automatically. If they are items you frequently use, see explanations what to do with them in following paragraphs.

Are your working documents messed up with documents you frequently use and shortcuts to program you launch and folders you visit?

Those things doesn't fit into new concept of Desk, but they are important to users as they put them on desktop. That creates a mess there and makes them not easily accessible, as they are available only when desktop is visible. So here is what Desk & Archive does for those specific items:

Shortcuts to programs on desktop - they are not shown on Desk, they are placed in the Launch bar instead, always available to you. You can always drag items to them to open that items with any of these programs.
Shortcuts to folders on desktop - they are not shown on Desk, they are placed in Sidebar instead, always available there and also always available in Archive submenu.
Template files on desktop - by clicking twice the star icon those files will be always available from New menu in Main toolbar. And then you can move them to any folder (e.g. create folder Templates), as they will be always easily accessible.
Frequently used files on desktop - by clicking once on the star icon those files are bookmarked and available in Bookmarks, so you can store them anywhere and clean your Desk.

Would you sometimes like to open several folders at once as simple as opening one of them?

It is as easy as selecting several folder and clicking Open command from Commands toolbar or item's context menu. You can even chose Look Through Subfolders from Open button menu, and see items from all subfolders of selected folders. Or do that as afterthought after opening folders, by setting Edit\Look Through Subfolders.

Are you tired of opening and closing many folders in your taskbar?

Desk & Archive will automatically recognize when new tab should be opened. So you don't have to open a new window for new folder just to be able to easily switch to previous folder. It is always easy to go back to places you have visited, and there is no mess in your taskbar.

Tab usage is tracked and unused tabs are grouped and later, if still unused, closed. So you don't have to think whether you will need that window again before closing it.

Would you like to open files without opening folders?

It is easy, as content of folder is previewed. But that preview is active and it takes just one click on item name to open it.