Maybe one of the biggest improvements in my life over the last five years is automatic locks on my car. [and it's a good thing my girlfriend doesn't read my blog, y'know.]

I almost always travel with a dog, so I want to open the passenger side first, and close it last. Used to involve fumbling with the key twice. Now it's just a button, and I pretty much never use the keys in the doors. Oh, and that whole "beep beep Hi I'm Your Car and I'm Over Here" thing is also worth the price of admission. I lose my car a lot.