1)turn the screen brightness down
2)Task killer use it!
3)take off live wallpapers
4)make sure gps an wifi are turned off
Actually, it depends on how you are listening to music. If you are listening to MP3`s that you have loaded to the SD card, then that is not really even a small battery drain in my experience. I drive 1 hour to work each morning with my DX running to my car stereo player via Audio Cable, and from off charger at 100% when i leave, I arrive at work still sitting at 100% with just music playing.Right now I'm ending the day, after 16 hours of unplugged, at 50-60% battery. The Droid X has the ability to get some RIDICULOUS battery life. (Ridiculous in a good way.) This is even with wifi on.
Probably the biggest thing that will drain your battery are the apps that you run. If you've got a ton of apps running in the background, then you're going to want to check on that and make sure that there's nothing constantly pulling data down, or doing any sort of high-intensity polling.
Listening to music will generally drastically reduce battery life, as well.
6 and 1/2 hours including loading a ROM? I am guessing you also did a back-up or 2 as well prior to loading the ROM...and then you did some texting and the like...anyone have any ideas what i could do, i use a lot of gps and navigation because of my job, when i get to a job site i close navigation and turn of gps a lot, and i am also on the phone a lot because of my job type....... but today. i was at 100% at about 2pm (now 830 pm) when i loaded Darkslide. and ofcourse that at up some battery. now my phone has been screen on/off and texting lightly since then... i am sitting at 50%. that is including downloading all the apps i had. is this kinda normal or am i just thinking that it is jsut really using a lot.... (more than normal)