Begin by searching a number of publisher websites and once you identify some well known eBook publishers, read information on their website to know what they have to offer and for how long have they been in the business.
Check the genre of the content on these publishing websites. Eliminate those from your list who do not support the genre of your book as you will not require their services.
Look at other books on the remaining websites to check the quality of their content. You can do this by purchasing an eBook from the website. This will help you get a clear picture of the publisher.
If your associates or friends are also writers, perhaps they can introduce you to their e-publishers.
After your research, decide which publishing company suits you and your content the most.
Before reaching out to the publishers, proofread your content, edit it in order to make it perfect. Remember, well versed content will be appreciated.
It is show time now; you need to submit your content to the potential publishing company and wait for their response. It is imperative to follow their instructions to ensure they will respond at the earliest.