I saw a tweet today by John Wiegley asking for volunteers to proof read the manual for Emacs 25.0.50 and Elisp 25.0.50.
Obtain the files: http://ftp.newartisans.com/pub/emacs/manuals/ (PDF and info formats)
Report bugs: M-x report-emacs-bug.
Is this the year you are going to make a contribution to an open source project?