I love my moleskine notebook, it just feels nice. I need a way to structure my books, and get to sections quickly but I hate those sticky tabs GTD addicts use to organise them. They just get bent, or pushed out of place, or lose their stick. I carry my notebook in my bag, my pocket, in my cycling backpouch. Anywhere. Stuff just gets bashed. I would much prefer a simple cut out 'inverted tab' like you get in old diaries to mark the months. A tool to achieve these would be amazingly useful, like a mutant stapler or nail clipper. To test the idea I got out the trusty Stanley knife: The squared notebook gives a nice line to follow for the cuts. Any tool should aim to exactly fit these lines, just to enhance the feel of the finished tab. The very square edge is a little open to becoming frayed and bashed, so the tool should be a curved die giving a nicely rounded corner to the tabs. Either the square shallow tab as shown here, or a deeper semi circular version would be nice. I clipped only 5 pages at the start of a section. The side view shows the general effect. These inverted tabs are very easy for your thumb to locate. I've used them to split one notebook into 6 separate sections, for separate projects, all along the vertical side. For a more sophisticated setup a mix of tabs on the top, bottom and edge could separate 3 different types of sections, with individual sub sections along the length of the edge. The 10 minutes playing with the Stanley knife was quite fun, but could grow boring pretty quickly. A tool would be very convenient, the standardised size and shape would be pleasing, and I bet the chances of slicing your finger would be much less than using a knife. I bet every moleskine addict would buy (and receive) several for gifts. Especially if they were a sexy leather bound minitool you could carry in your bag. My googling hasn't turned up any suitable tools, there are several die cut tools featured on crafting sites, but none are really small enough, or simple enough to use. If you know of anything suitable please let me know below or at steve@inventoids.com. As ever, this was initially sketched on the train - before mocking up the output. Here is the sketch: