In this excerpt from the upcoming Science Writers' Handbook, Emily Gertz advises journalists how to use social media in their work without hitting any career-damaging tripwires. Also, Sarah Webb reflects on how blogging became a central part of her writing business. The Science Writers' Handbook was funded by an NASW Idea Grant and this excerpt is viewable by NASW members only. You can pre-order the NASW-funded Handbook from the NASW Bookstore.