The American PEN website has some invaluable resources regarding the business end of literary translation, including a section on Negotiating a Contract, a Sample Contract, and also a list of Selected Books on Translation.
We never thought anyone could write a 'how-to' for literary translation, but then someone did: the Dalkey Archives' Translation in Practice book is ostensibly the notes on a 2008 symposium on literary translation best practices, but the result is wonderfully written, audaciously broad-ranging, and incredibly helpful. Notes on the nitty gritty of dealing with editors and authors, negotiating contracts, dealing with regional dialect, editing… Nearly everything you could want to ask.
another how-to book, with lots of good insights, by two very reputable UK-based teachers, Valerie Pellatt, and Eric Liu. This is Routledge course-book, available direct or from Amazon.