For bookkeeping I use Outright.com. Outright is great because it keeps everything separate. It also links in with Paypal. I try to make all of my material purchases or shipping or any transaction with paypal. Outright will automatically take all of that information and plug it in. You can add purchases made or payments received manually as well. It also preps your taxes for you. Great free service.
Another great bookkeeping software is Chronicle for MAC. This app is a great way to organize and collect details about bills etc.
Square is a great way to accept credit cards. Not only is the app free but they also send you a card reader for free.
For printing postcards I normally use Vista Print
When self publishing I try to make things a simple as possible. There are a million self publishing tools online but I use Blurb the most. Blurb is very simple, user friendly and just really great. You don't have to learn INDESIGN or generate a PDF with custom settings. If you are not in a hurry blurb is great.
You can also archive your blog, if you have one,
Another great online publishing company is lulu. They are very similar to Blurb but they allow for more customizing and they have a great ebook publisher.
