Below are links to all the main Self-Help categories on Amazon. I have included links for the US, Canada and the UK. (Please choose your appropriate country, or you may not be able to see the prices.) Then simply bookmark the pages on your browser, and return at your leisure.
Be careful when going through the categories!
Although each link will take you to ebooks that are sorted by Price (from Low to High), there will be books on each page that are NOT free. This is because Amazon also shows books that were recently free, and they will remain so until their rankings drop. Unfortunately, it makes looking for the free ebooks take a bit longer, but it's still worth going through the pages, as often the newest books will appear in the later pages. Eventually you will come to a page where there are no longer be any free books listed, at which time it is safe to stop looking.
Visit the page daily!
Generally you will find 25-50 free titles every day. Some of these will be books that you have already downloaded. Others will be totally new offerings. Many books are only promoted for one day, and may not appear free again for many months. If you are an avid reader, I recommend visiting daily.
There is no limit to how many free books you can download :)
Don't worry if you previously downloaded the book (but have forgotten). Amazon will remind you. You will find a yellow strip at the top of the book order page which will tell you that you already have it (see image below).
Happy eBook hunting!
If you have questions, please feel free to ask me on Twitter :)
Amazon.com Kindle Books
FREE Kindle Reading Apps > http://amzn.to/PBERnv
Self-Help - http://amzn.to/111Mmd3
Heath, Fitness and Dieting - http://amzn.to/10T2df4
Parenting and Relationships - http://amzn.to/114Fzki
Religion and Spirituality - http://amzn.to/12Wwnnf
Business and Investing - http://amzn.to/114FMnQ
Amazon.ca Kindle Books
FREE Kindle Reading Apps - http://amzn.to/ZVrkTl
Self-Help - http://amzn.to/119xrAa
Heath, Fitness and Dieting - http://amzn.to/10YyKlA
Parenting and Relationships - http://amzn.to/Zoidob
Religion and Spirituality - http://amzn.to/119xH1T
Business and Investing - http://amzn.to/12WF297
Amazon.co.uk Kindle Books
FREE Kindle Reading Apps - http://amzn.to/114LwOd
Self-Help - http://amzn.to/12WFmoq
Heath, Mind and Body - http://amzn.to/YByASt
Diet and Weight Loss - http://amzn.to/XJFZzB
Exercise and Fitness - http://amzn.to/175gis5
Parenting and Families - http://amzn.to/175gs2O
Religion and Spirituality - http://amzn.to/XJGdqA
Business and Investing - http://amzn.to/114LqGq