I rarely use analog technology for ideation. I use it to brainstorm detailed information, on occasion, build work schedules, or pose occasional questions. If anyone's interested, you can create the index cards and do layout on your computer desktop (if you use Windows Vista or later). Start, type sticky. Hit enter. Hit the plus (left side of the sticky note) to create a new note. I can fit, on my screen, 60 sticky notes without overlap (if they are 1.5 inches x 1.5 inches). You may need them bigger. Once your screen is filled, and notes, you can hit the PrtScn / SysRq button on the keyboard. After, paste in Microsoft Paint. It may be cheaper to do it this way, and be safer for long-term storage. It's portable too!