If anyone is interested in thinking of pursuing further studies in economics or is curious to know more about the field, I recommend browsing through some of these resources. It may seem overwhelming, but I hope it's a good start since I often revisit them for help.
Your local university's Department of Economics website
It is worth a look to see the actual research that economists near you do in their respective fields. (e.g. UCLA Economics, UCLA Anderson)
This website founded by Professors Tyler Cowen and Alex Tabarrok is a fantastic starting point that contains hundreds of free videos related to learning economics, offering courses on the principles of economics as well as courses on development, trade, and much more. From a more applied perspective, this free course by Professor Raj Chetty is a great introduction to learning about how economists use data to understand and solve various types of social and economic problems, from inequality to education.
If you are interested in economic history, this website contains course syllabi from universities around the world that provide extensive reading lists to follow along. Last but not least, this course by Dr. Marek Hlavac is a survey of the research done in economics that have won a Nobel Prize. This course is especially useful to learn more about the different fields in economics and their historic contributions to the discipline today.
This provides a great overview on how to frame your undergraduate career to prepare for an PhD in economics. Here it is in checklist form.
A compendium of advice of almost everything related to pursuing economics at each stage (from applying to a PhD, finding a research topic, coding resources, tips for writing and presenting, etc.). His website also contains valuable resources for learning Stata and GIS. Also check out this website by Dr. Claes Bäckman that builds on this resource.
A great resource for writing an undergraduate thesis in economics. The appendix is especially useful for where to look for ideas and data, as well as descriptions of the various fields of economics.
If you have an idea of what topics you find interesting, it is best to see where the research frontier is at. The Journal of Economic Perspectives publishes reviews of recent topics in economics written in an accessible, less technical fashion. For working papers in economics, NBER and IZA are frequently updated with current research. In addition to these resources, reading the news (Wall Street Journal, The Economist, New York Times) also can provide great and relevant ideas.
These are great resources for data related to topics in economics. Also refer to Appendix B in this guide for more.
Mapping American Diversity by National Geographic
Our World in Data by Max Roser
The Economist as Detective by Professor Claudia Goldin
What it means to be a Filipino American by Professor Kevin Nadal