and don't leave it in a store parking lot with all your belongings in it. All those times I had my stuff stolen was because even with tinted windows my stuff was easily seen. Get a blanket or tarp and keep your car looking basic. People with tons of stickers on their rigs, guess what, thieves see that as a better target. Especially if they are high end brands.
We learned this back in the day of amazing stereos and crappy alarm systems. You want to drive a 90s vehicle, you need to think like a 90s person. We didn't have tight window seals, complicated electronics, immobilizers, and boring SUVs. We had cars you could pop the clutch to start if your battery died.
(and we had guns and bats to my violent peeps here. Never murdered anyone, but we ****ed some s*** up when needed)