I read approximately two books a week, for years already (almost everything I read is non-fiction). The total amount of books on my e-reader is more than a thousand. It is impossible to make 'top 3'-lists, because all of the books are so different and too valuable in its own way. However, all books below I have read at least twice, because I found them valuable. The mentioned software, is the software I use within my companies. Almost all links are affiliate links :)
Also worth checking: podcast 'How I built it'
Also worth checking: ISTA retreats (for all the Dutchies: zie mijn podcast aflevering 1)
Also worth checking: events van Tony Robbins
Online courses: Kajabi
I use Kajabi for my online courses. I like the fact that they have an app, amongst others.
Send mailings: Mailblue/ActiveCampaign
This programme I use to mail, create waiting lists and send offers.
Create a website: Phoenix Pages
A very easy drag-and-drop website builder, completely focused on making conversion. I use this for my C.Academy website. My other website - such as this one - I create in WIX, which leaves more space for creative freedom.
Shopping bag & affiliates: Plug & Pay
Plug & Pay is a system with which you create payment pages. All my courses are sold through these checkouts. You can also create an affiliate system.