Prior to Trailhead, what were your biggest work or career challenges?
One of the hardest struggles I found before Trailhead was learning how to properly combine two technologies using best practices — let’s say creating a web page that needs to consume data off Salesforce. No longer do you have to build a web page that queries Salesforce API, accidentally go over the API limit and go down for almost 24 hours. Now there are Trailhead modules about Heroku
and Heroku Connect
and it will explain why you should not consume the API on a client action.