I self-published on Amazon (Kindle) and IngramSpark (PrintOnDemand) in October 2014
Marketing is a slog - I have no magic answers but a few of these may give you an idea
I took the following approach: Basic web-page; Twitter; Facebook; Amazon Author Page; GoodReads Author Page
Priority 1 - Get Reviews on Amazon and GoodReads - try to make them from SciFi enthusiasts
I wrote ~100 begging emails to SciFi Bloggers/Reviewers etc; I got about 5 Reviews... painful but about right for cold-calling
I also asked to be interviewed - and it worked once - I got interviewed by SF Signal - it did not translate into any great sales impact but it was awesome to do it
Google AdWords - I spend about £1 per day on this for the last month; I cannot be sure yet of its impact but it feels like a decent drip feed of publicity
Amazon Specific - I have not done Amazon "advertising"; and there are a bunch of blogs on Amazon Meta-Data... take a look in Kindle Forum
Good Reads Specific - Build up a network of like minded Writers - you will get to read great books - you will learn your craft - you may get improved Beta Readers for your next book - you can use the Goodread Giveaway
Discount Sites - I have considered these to be too expensive, but they do exist
https://www.bookbub.com/partners/requirements
http://bargainbooksy.com/sell-more-books/
http://fkbt.com/for-authors/
http://indie.kindlenationdaily.com/?page_id=832
http://booktweeters.com/
Online Magazine and Blog Advertisements - I tried this but it was ~£50 for an image for a month which got me 3 sales...
e.g., SciFi Now; SFX Magazine; Lightspeed Magazine -- not really recommended for Indies
Overall it sounds like you are well ahead of the curve, but you do need a plan for Amazon and GoodRead reviews
I am planning to
- Write more books, your Amazon page (etc) looks much more professional if there are 3 or 4 books by you
- Continue to work within communities of writers
- (As Ralph says), try to get "up the lists on Amazon" this can be helped by judiciously choosing your meta-data
- Try to associate your Twitter/Facebook feeds with "content" rather than pure product push... hard to do also - it takes time
- Go and see the local bookshops who will often try to support Local Authors
I have no idea about Book Fairs, I suspect that Independent Authors won't get much attention from retailers; assuming your genre is SciFi my feeling is that online is the way to go --- but I know nothing
regards
FibE