I love products like this, especially those that are form-fillable, because it makes my life so much simpler. As a DM, I have a lot to keep track of, even in a relatively small campaign setting, and having a folio that I can record pertinent information in makes it much easier. The DM's Campaign Record is just such a folio.
It has space for just about every aspect of a campaign that you might need to reference. There is a page for published resources that you are permitting in the campaign, a world overview that includes the names, religions, capitals, population, alignment, and governmental systems, spaces for major deities, holy days, currencies, geography, guilds and organizations, churches and cults, towns and cities, taverns, inns, and shops, and other important locations.
One page is devoted to plot development, through all three levels of play--heroic, paragon, and epic. There are spaces for major and minor NPCs, as well as a player character quick-reference. Never again will you need to ask a player what their character's Fortitude save is. There's also a space to record PCs deaths, including the location and circumstance.
A 3/4-page hex grid gives you plenty of room to sketch out the campaign area, while the calendar page will not only help you develop a calendar for your campaign, it will help you track the passage of time. The session history page insures that you will never forget an important detail from a previous game session ever again, and there are custom encounter tables and a blank page for recording house rules.
Ah, but that's not all! You also get a random table of results for picking pockets (based on the social status of the victim), a tavern/inn name generator, and an NPC generator that provides enough info to handle a brief, spur-of-the-moment encounter, or can act as a springboard to design a more memorable NPC.
Overall, I am very pleased with the product. My only complaint is that when I fill out one block of a form, the result duplicates on every single block of the same page. If I drop to the next line and make a change, the change replaces previous entries. Aside from this minor issue, I highly recommend this product for any GM who wants to put more time into creating the campaign, and less time into worrying about where you put that sheet with the information on the local cult.