A few tips I have:
- Email your list a 7-12 day follow up email series, with each email containing valuable information that helps your subscribers solve their problem. Include the occasional promotional reminder about your main product and how it will solve their problem. At the end of the series send them a promo email dedicated to promoting your offer. Also send the occasional testimonial/success story/case study about someone whose bought your product. It's said people often need exposure to an offer 7-12 times on average before they buy.
- Don't send lots of promos, only every 3-4 emails is what i do
- Send them something of value right off the bat as soon as they subscribe
- Add your personality into your emails, be yourself, it will make your emails memorable if people can relate to who you are and will want to open your emails more
- Look after your list and don't promote crappy stuff that won't help them just for a quick buck, also promote things of value
- Something I do is send my subscribers to 'pre-sell' pages that contain an article or video that has valuable content on it then at the end of it suggest they check out my offer...this works much better than just sending them a promo email straight to the offer.
Those are just a few things I like to do...hope that helps