Car Trunk Raiload

I may have asked about this here before, but I still don't have a good solution.

I want suggestions on how to organize items in a car trunk so they stay where I put them. I tried a cargo net for a while, but even when the adhesive anchors don't pull loose from the painted metal, keeping things from sliding out under it has proven problematic.

I like to keep some basic emergency equipment in a car. Umbrella, tools (including a lug wrench spider), better jack (electric screw jack which plugs into the cigarette lighter socket) and so on. A couple of these items are rather heavy. All of them tend to change locations no matter what I do.

Any useful suggestions will be greatly appreciated.