When I do repairs on my car I put slips of paper with my contact info hidden in places. I just reupholstered my seats and put it in them so you can look through the vents and see it. I put my info in the doors, inside the fuse box, inside the radio, under the trunk mat, on the back of the glove box, Magic marker the back of chrome pieces, etc. You may just find your stuff later and be able to identify it. I always scrape my name in the bottom of my battery also. I have recovered many tools from my friends tool boxes with my name on them. I like to ask them, "where did you get this", there is usually a story and then I ask why they put my name on it and recover my tool.
What do the Lojack things cost and how well do they work? Which one is the best?
I also have a steering club typelock, not a big deterrent, but maybe the police will see that and question the tow truck guy.