With all the advice in the posts above, I think that you must have a pretty good idea about what your fellow techs are doing to survive
I have found that radio, drop box and leaflet advertising work ok in times of regular business to get a current flow of new customers. They will however not work in times of recession (in most cases) and especially in neighborhoods where you can not charge decent minima.
I believe firmly today that you can not do advertising without investing yourself maximally. The times where a simple newspaper ad would bring the customers running are over, and for good.
Good advertising relies on footwork, your own !
What we do as a standard when we open a new shop is :
- have pamphlets printed with by a professional on glossy paper
- go out and introduce yourself to all storefront businesses, tell them what you do, ask them for advice (people love to give advice), ask them to forward potential clients to your business (you may even propose a fee for every final customer they send you; that works quite well on the less fortunate areas), and finally ask if you can leave some of your pamphlets along the counter (customers often wait at the counter, they read anything they get their hands on).
- go and see the institutions in place (get a list of all clubs, associations etc.). Again tell the secretaries what you do, propose your services (after some small talk), leave pamphlets, business cards and your telephone numbers.
- go to church !! See the preacher, talk to him about his activities, see if you can be of any assistance (designing flyers, printing handouts etc.). Propose this service for free if you so see fit. Il will cost you little, but will open many doors otherwise shut to you (especially in the south-west in the US)
- do not drop box your fliers !! They will end up in the trash with the rest of the ads. Instead hand out your fliers in the street, or put them behind the windshield wipers on the driver side. People will hesitate more to drop you ad in the street, will not walk to the nearest bin, so your flyer will end up in the car or the pocket/purse.
- have decent prices, but offer discounts ! This is a largely neglected way of working today. People like discounts. Give discounts to students, families, seniors, etc.
- give discounts to returning or referring customers (coupons)
- go for the businesses. Noone can survive with residential customers only. One business customer will equal very many residential customers in the long run.
I hope that things will pick up for you soon. Every crisis is good luck for the innovative, bad luck for the inactive.