MH,
From a person who has learned from mistakes, if it is writing there are several texts, such as "The Elements of Style" by Strunk & White, but nearly everyone who has made the same mistake as me (2.5 years in and looking like only over halfways :-( ) , get writing to apply all the tips and get constructive feedback. It doesn't need to be from your supervisor, who maybe too busy (maybe a friendly post-doc or other friends in your dept.)
Sorry this doesn't directly answer your question, but building up an arsenal of texts is no good unless applying it, and for all I know, you are already doing this (if so, fair dues and keep up the work).