"The Practical Writer" ed. by Therese Eiben & Mary Gannon with the staff of Poets & Writers Magazine is a couple of years old but still has some great relevant advice, especially "Loose Bottoms" (about editing your work - best advice: you can probably cut your first and last lines), "How to Land an Agent" (a specific plan for finding an agent for your work) and "How to Read Rejection" (about decoding responses to your work).

Also fun stuff about titling and getting into glossies or small literary journals. As with any anthology, some articles are better (and more useful) than others, but this one will give you a lot of helpful perspective and some concrete tools.