I run a small one person business and am completel...

I run a small one person business and am completely lost when it comes to technology. Until recently I have been writing up my invoices in word, which has been inefficient and disorganised to say the least. A friend recommended Bullet HQ and it's been fantastic. It's really easy to use, stores all of your information in one place, and looks great too. I know it has many more features than I am currently using (invoicing only) and I'm looking forward to making use of these too in the future.
One recommendation - a Pro Forma option for advance payment, as well as more editable payment terms in the invoicing templates, would be great!