Off the cuff idea - rather than flyers how about free screen wipes printed with the business name / contact details on the individual packaging?
There is one other thing that you need to be aware of.
The Gods do love idiots as they seem to make an awful lot of them.
Be prepared, you will be dealing with the customers that larger high street PC specialist retailers with in house repair workshops have turned away either because of outdated hardware, unsupported operating systems and other software. Or the fact that they are just barking mad.
Recent examples - client with an elderly Toshiba lifebook running Win 98 [32MB ram] in one hand and a copy of Win7 in the other needs help with installing the 'upgrade' he purchased from another retailer.
But enough of my problems for monday morning...
Dig out that clean shirt and tie and get your face known. Build links with related business owners, such as web design and training providers. Whilst they may not be able to give you much work directly they may recomend you to others.
Charity Work - I know... time is money and doing something for nothing does stick in the throat but bear with me on this. Local libraries and community projects often have a computer club of sorts for seniors who want to learn about using a PC and the internet.
Getting your face known in this circle can generate both sales of new kit and tech support requests.