You're doing a job. It'll only take five minutes, all i need is that tool, hmm, where is it, i've only just seen it, it was in my toolbox right here for goodness sake!
...and by the time you've emptied out your toolbox to find the right screwdriver, it's taken four times longer than the actual job.
Sound familiar? Happens to me all the time.
A few years ago I was looking at Adam Savage's website, and was intrigued by his concept of "first order retrieveability": you can get to any object without having to move anything else. Here's a picture of one of his fantastically ridiculous toolboxes. Notice how almost all the tools are standing vertically so you can find them and take them out instantly.
I thought the idea was superb, and decided to give it a go myself. Using some small plastic shelf boxes rescued from a skip, and plastic hose cable tied to the outside wall of the box I modified my oil can toolbox. It worked very well. I could reach my pliers, craft knife, screwdriver, whatever, right away. Instantly and frustration free!
I've recently got a new toolbag for work and after a few months of chucking random junk in it, I was starting to feel a bit frustrated with it. Here's how I added first order retrievability to it!