All,
Over the years I've worked with a number of analytics tools and have found having "Reference Cards" to be helpful. What reference cards do you use with the tools you like to use? Please share below.
--Tom
Here is a link to the R-Studio's uber page of Cheat Sheets.
https://www.rstudio.com/resources/cheatsheets
If you are into R and the tidyverse then this is definitely the place to check