Write a Kindle e-bookEarn up to 70% of the LIST price when you self-publish

EL James's Fifty Shades of Grey started as a self-published e-book – now's your chance to emulate her success. Amazon's Kindle Direct Publishing tool lets you upload your own e-books instantly, for free. Every time the book sells, Amazon gives you up to 70% of the list price (excludes VAT).

While not a guaranteed money-spinner, e-books don't have to be Booker Prize contenders. If you're a specialist in a niche subject, from worm composting to rollercoaster riding, you could pocket a little extra each month.

If you need inspiration, why not try the NaNoWriMo campaign to write a novel in a month, which runs every November.