Graphic designer David Butler has an article on designing your own logo here.
If you’re after inspiration for typefaces/fonts/lettering, the printpattern blog had a heads up on a new book, New Vintage Type. It’s available from Amazon UK or US, or I’m sure at your local independent bookshop.
If you haven’t looked through the archives at printpattern before, treat yourself. She finds, and shares, the most wonderful range of ideas and covers so many designers’ work.