"The difference between the right word and the almost right word is the difference between lightning and a lightning bug." ~Mark Twain
Here's a fun website: Gender Genie. Paste in your text (more than 500 words works best), and it will tell you whether the author is male or female. It got me right!
I always find this page of agent Donald Maass's website interesting: it's what the agency is looking for. Sometimes the concepts seem REALLY out there (time travel fantasy about a blind bike messenger, or something), but the most recent one asks for holiday submissions (looking ahead at least a year, of course). So if you have anything, maybe you should polish it off and submit it!