Thought I'd post a tip which we have found to be helpful when trying to get a response from a client. I'm sure we've all found it can be hard to get people's attention these days, but sometimes a very simple change can bring surprising results. What we have taken to doing when we have an 'information request' of a client and we need them to return forms, applications etc, writing your name on the return envelope seems to drive the response rate up considerably.
So, next time you need to get your customer to do something like this, try hand writing 'Attn: yournamehere' on the return envelope. It's an easy way to get people's attention and we have been very pleasantly surprised by its effectiveness.