As stated above, fermentation temperatures are a big deal. Get a "fermometor" to affix to your carboy (which is another must have starting piece, so you can see it working and RDWHAHB). Make a swamp cooler, if needed, to keep your fermentation temps in check! Just one bad batch for me so far, before temp control, you don't want banana beer.
Oh, and if you don't think you need a swamp cooler, realize that your beer temp rises considerably within the first few days of fermentation. An ambient temp in your room of 68F could easily turn into a 74F beer if it is fermenting vigorously.
EDIT: I wish I had StarSan on hand the first few brews. SOOOOO much easier and reliable than thoroughly washing bleach water out of everything. Stuff always seems to smell like bleach if you've been handling it while washing and rinsing with it.