How to make nice, perfectly formatted APA tables for Microsoft Word in a blink.
How to randomize participants to groups or conditions easily in R! + Bonus: how to make a runsheet with your randomization conditions!
How to quickly test linear regression assumptions (through visual assessment of diagnostic plots or objective tests).
How to easily make a bunch of moderations with simple slopes in a preformatted table.
How to easily make a bunch of planned contrasts (pairwise comparisons) in a preformatted table.
How to easily make a bunch of t-tests with effect sizes in a preformatted table.