Just the other day someone smashed through the passenger window of my pickup truck and stole a fuckton of my tools. I'm still so immeasurably angry and now that I'm almost done finding all the glass, I want to know. Do any of you guys take measures to make your vehicle physically difficult to enter? I don't just mean wheel club or alarm type of deterrents, I mean to make the act itself of breaking in extremely hard? My truck is my mobile mechanic's shop and I stow literally hundreds of pounds of equipment, fluids, and storage in there. I'm not gonna haul everything in and out every morning and night, that'd take forever. Tint is a big one for me, even though my shit was already quite tinted. What else?

Also, anyone else with manual locking doors have good ways of ensuring they can't be opened?