The sheer variety of geom_* in ggplot2 is overwhelming and astounding, especially with the control over the many aesthetics such as shape and color. For example, the ggplot2 cheat sheet is packed (link).
I frequently forget which aes parameters exist for each geom_* and need a quick look at the help pages. Using the information from the cheatsheet, I was able to quickly summarize the aes parameters available for each geom_* (link).
Yihui’s minimal theme for blogdown is wonderful but the Academic theme by G. Cushen provides several benefits, the main one for me being the site is essentially a better-looking electronic CV. blogdown + hugo also makes it easy for me to add images and keep everything organized on a git repository from within RStudio.
Unlike many other themes, Academic has several different page types beyong the typical post such as project, and publication.