Instead of simply sending out a broadcast sporadically, why not choose to create a newsletter. That way, you can send one out each week/month that includes said promotions, offers, site updates, etc. in one place. That way, subscribers won’t get annoyed of you sending out too much content to them, as they can expect to get everything in your regular newsletter.
When choosing a theme, focus on something that is clean and uncluttered. Please refrain from going for anything particularly striking or “flashy” – it’ll typically result in a blog design that is not conducive to reader retention. Social Triggers is a great example of how a clean and simple design with plenty of whitespace offers an experience that is easy on the eye.
We’ve changed email marketing from iContact to MailChimp and, just now, Aweber. We changed from iContact to MailChimp to cut costs. We then switched to Aweber because Mailchimp will not allow you to start an Autoresponder series on an imported list PLUS, as you mentioned, Aweber has much more robust measuring/management tools. However, people should be aware that Aweber requires imported subscribers to opt-in all over again.
I wasn’t sharing my affiliate link for ConvertKit (but I am now – I earn a commission if you buy with this link) as this move was happening because I wanted to take a couple of months to really test it out. After using it for more than three months now, however, I’m extremely happy with the results and am confident in my recommendation. Please note that I do receive a commission from the affiliate links to ConvertKit that are on this page. [Full Disclosure: I’m a compensated advisor and an affiliate for ConvertKit.]
After you have entered your "List Name" you will need to enter a "List Description." Here is where you will describe the kind of information you'll be sending from this list. There is a 400 character limit for the "List Description." Subscribers will see your "List Description" on the unsubscribe page if they ever go to unsubscribe from your list. Once you are done entering your "List Description" click the "Next Step" button.