Boring stuff

Emacs

1. String searching and replacement accross line breaks in Emacs: use regexp-search-and-replace after substituting each space in the search string by \s-+.

LaTeX

1. Some less well known tricks to save space in LaTeX:
   • Add \looseness=-1 to a paragraph that ends in a short line. It urges LaTeX to format that paragraph more tightly.
   • Add \usepackage{enumitem}\setenumerate{topsep=1pt} to your preamble to reduce space before every enumeration list (similarly for itemization lists)
2. Comprehensive LaTeX symbol list or sketch it