Hey, I also own a mobile detailing service. I have had the most success with placing business cards at gas stations (well those who will allow it). I also place at these gas stations a flyer with a coupon on it specific to that gas station. Another thing Id recommend is attending car shows. You can get a booth, but that can be expensive. I some times will just walk around handing out flyers or even set up a display in the parking lot... which by the way can get you kicked out if you put it in the wrong place
I am restructuring my business at the moment to include my handyman business, but will be advertising in the local paper soon.
If you are just getting started with advertising in papers, I would recommend advertising in a local, rather than city paper. Esp if you are a one man show. Another thing you can do is send in a news tip or have a customer send one in to a local newspaper... some times they will do a small article on your business, esp if you just opened for business.
Like what was said before, I would recommend joining the chamber of commerce as well as a business club. There are many referal clubs where businesses get together to share leads and refer business.
Magnetic or vinyl signs on your vehicle practically speak for themselves... you can advertise 24/7
So far, I am in the process of doing all of this myself and what Ive done so far seems to be working. I wish you the best of luck
Didnt realize this was an old post...