A teacher can explain bicycle parts, but only you can learn how to ride.
Economic expertise is based in formal and tacit knowledge. Formal knowledge can be written or explained verbally, for example mathematical properties of the Metropolis-Hastings algorithm. But tacit knowledge - practical know-how - comes from doing.
Economists do research - its a process for creating new knowledge that uses formal and tacit knowledge. We communicate this new knowledge through argument, which is composed of the following parts:
1. a main point, also known as a recommendation / claim / conclusion / thesis / assertion
2. evidence, such as historical facts, data tables & charts, econometric findings, citations to other research, etc.
3. assumptions/theory (also known as 'reasons') linking evidence to the main point.
4. argument structure: the overall inferential architecture—how the evidence and assumptions fit together to support and imply the main point.
Argument Mapping introduction (Harvard)
How do Strategic Buyers Value Synergies in Different Macroeconomic Conditions?
How Does CEO Compensation Structure Affect Healthcare Firms' R&D Investment?
Alternative measures of profitability and investment in factor models
Excess Return Properties of Informationally Insensitive Dynamic Return Predictability Strategies
Writing what you like (developing taste)
Minto Pyramid
Guide to Writing in Economics (Dudenhefer)
Twitter feed on Social Science Writing (David Eil)
An indispensable guide to nonfiction writing
Ceteris Paribus (UNC)
Comparative Advantage (Stanford)
Dartmouth Undergraduate Journal of Politics, Economics and World Affairs
Student Economic Review (Trinity College Dublin)
The Developing Economist (U Texas Austin)
Math pre-refresher (Harvard)
Mathematics for Economists overview (85 pages)
Statistics (MIT)
Causal inference introduction (Elise Dumas)
The long and short of OVB (M. Joshway)