I go with AJB on this one. I use Microsoft word all the time like him. I just set up different templates for different situations - Invoices, quotes, covering letters, Etc; The details relevant to your particular customer are entered and then either posted or eMailed to them. If they are eMailed no stationery or postal costs are involved. We must, at this point eMail 60-70% of our invoices. Even most commercial customers are happy to work this way. Logically, if you think about it, if it is delivered by eMail, they can just integrate it into their computer files without the need to photocopy or scan them.
When I first started I used to use the best paper, best printers etc, thinking this would impress them. In short, I don't think it doe's, especially nowadays. If we mail anything now, we use 100gsm white paper - around £5 for 500 sheets as opposed to around £35- £40 top quality paper.
However, I have just seen a better system that doe's much more than this, that can actually automate the stationery side of your business. Kev Loomes is your man.
Jim