More wonderful awesome helpful resources for learning Power BI

Books

PBI for the Excel Analyst
(all rounder)

Master Your Data
(Power Query)

Supercharge Power BI
(DAX)

CTCD Power Query

The Definitive Guide to M

The Definitive Guide to DAX

Story Telling with Data

Big Book of Dashboards

Practice Data

Coffee Shop Sales & Gym Membership Data Only

Access Analytic
Templates and Downloads

Maven Analytics
Data Playground

Kaggle

YouTube Channels

Access Analytic

Guy in a Cube

SQLBI

Curbal

Power BI.tips

Excel is Fun (Mike Girvin)

Enterprise DNA

Skillwave

How to Power BI

Havens BI

My Online Training Hub

Excel on Fire

Goodly

Kratos BI

Chandoo

BI Gorilla

Avi Singh

Radacad

Microsoft Official

Blogs

Data Goblins

Radacad

Chris Webb

Fourmoo

Matt Allington

Melissa Coates

Imke Feldmann

BI Polar

Ben Gribaudo

Kerry Kolosko

Meagan Longoria

Laura GB

Power Bi Tips

Metrics Treb Gatte

Paul Turley

Microsoft Official

Podcasts and Interviews

Wyn - Power Query Magic

Raw Data - Rob Collie

BiFocal

Explicit Measures

Unpivot

Power BI Guy

Kasper on BI

Lars Schreiber SSBI

External Tools & Helper Sites

DAX.guide

A list of all DAX functions and help with how to use them

DAXFormatter.com

Automatically format your DAX

PowerQuery.how

M code examples and documentation
(Rick de Groot)

Bravo.bi

A quick way to analyze your data model and format your DAX. Includes ability to Export Tables to CSV

Tabular Editor (2 & 3)

Productivity Tool for the developer of Models. Write DAX in a separate UI, calculation groups, scripts, debug and more.  V2.0 is Free 

DAX Studio 3.0

DAX optimisation tool. Plus ability to export tables to CSV (watch video)

Measure Killer

Locate and remove unused columns and measures
(Gregor Brunner)

PBI Cleaner (Free)

Find which measures and columns are used in your report
(Imke Feldmann)

Field Finder (Free)

Visually analyze where fields are used in reports
(Stephanie Bruno)

Business Ops Collection

A one-stop-shop for all the latest versions of many External Tools.

DAX Optimizer

Performance Tune your model
(SQLBI)