These are the resources that I use to build my online business (in no particular order of importance!)
Autoresponder/Email Marketing Software
GetResponse has helped me grow my mailing list, keep in touch with my subscribers and automate many of the activities that I used to do manually. Having an autoresponder is a must for anyone running an online business.
Website Hosting
I can highly recommend Hostgator for hosting your websites. I have a reseller account so I can have several websites on one account which also makes it easier to handover websites if I decide to flip them!
Automate Your Articles To Article Directories Submissions
I love this ArticleBot software, it’s very simple to set up and once it’s set up you can submit your articles to over 100 article directories with just a few clicks. You can set up several “projects” which link back to your different sites for even more value. Just as an aside, I still submit my articles to the major article directories (e.g. Ezine Articles) by hand but this is a great way to get backlinks from the lesser directories.