Many of us are aware of only console.log.
But console api in Chrome/Firefox has a lot of powerful methods -
console.group, console.groupEnd - which help in grouping log statements.
console.time, console.timeEnd - which help in measuring time taken by a snippet of code.
console.timestamp, console.warn, console.info, etc etc..
More info - https://developers.google.com/chrome-developer-tools/docs/console-api