I started April 2009 from scratch. I knocked doors for 3 months, wore out a pair of boots and had bleeding knuckles in doing so, but haven't knocked a door since. Total advertising spend so far: a tenner.
I knocked the door and said "Hi my name's Carl Welsby, I live in Crymych. I was wondering if you had or were in need of a regular window cleaner?". If they said they did have one, I thanked them for their time and walked away. If they said they had one and they asked me to quote I asked them why they wanted me to quote. If it was because they were not happy with them or they were unreliable then I quoted. If it was because they were looking to drive down their spend I declined, explaining I didn't want to take another mans business ( I also knew that if I got the custie and someone else came and undercut me then i'd be out: such custies aren't worth having imo). It will get back to the other windies and you won't put their back up (unless they are nutters).
My advice is:
No-one owns "a patch"
Don't quote if they have a windie UNLESS they are unhappy with them
Always stop and talk to other windies or at least honk at them and give em a wave. I have one close to me who has given me work and i've dropped off a slab of beer in return. It's better to be mates.
A price war hurts everyone. I don't want to be busy as hell earning begger all.
Don't price too low, but deliver a first class clean that gives good value for money. If in doubt add a couple of quid to the price.
Do any clean you can at first, but slowly dump the poor payers and ones where they don't clean up the dog poop. It's a great feeling to be able to chuck custies who won't respect you.
Do the occasional freebie - garage doors etc. BUT tell the custie you've done it so you get the credit!
Get a website. But get your van signwritten first - best way to get new business.
And for Gawd's sake say a smiley hello to people who pass you as you work - you'll be amazed how many ask you "How much do you charge".
I'm sure others on here will have a view on these but they worked for me.
I used to work in a stressful but well paid office job, travelling all over the world on business and I can tell you I wish i'd started window cleaning from school rather than when I was 46. It's a great job, providing a valuable service and one in which you can hold your head high and say you own your own business.
Best of luck. Unless you're on my patch lol