I came to know about a service based in the US called Honeybook (https://www.honeybook.com). It basically manages the sending of contracts, invoices (signing and payment) and has a bit of task management incorporated into it. I enquired, but it is not available to Australians just yet.
For me - it seemed perfect. Up until now, I have been blessed with excellent clients and haven't needed to refer much to the "fine print" (t&c) in the quotes I have been sending out. Until now, I have a current client that has really tested things, to the point where I am reviewing my pricing. It has also lead me to rethink the way that I send contracts (as well as getting them signed).
Does anyone know of any system or program to manage this aspect? or is this something that you manually do? This is my weak point that I need to toughen up and I need to get better at taking deposits.
Also - I was looking at "The Business of Design" book - is this a worthwhile buy for this subject?