dont have near the amount of stuff in the boot that you do Ciaran , have a decent wrench for wheel nuts and a good first aid kit , plus a small socket set , all fit neatly into the spare wheel well ,
I probably have as much or more "vital" crap in the boot
No way of keeping it tidy either... other than that I try to seldom or never open the boot -- still have to change the spring which is a heavy one for the big STI spoiler and since the smaller WRX spoiler is fitted it tries to launch the boot lid through the back window every time I pull the lever :banghead
... If anyone has a big spoiler fitted with a small spring and wants to swap springs -- pm me
I see you are shopping in Lidl, I stole one of their cardboard boxes and put everything I might need in there, and then stick it to a side... well, if I am turning sharply, it does sometimes travel, but stays in the box at least...