...but one thing that i did that no one mention but they prob did was to leave he phone fully discharge. i was told this would help the battery .
This is another area of debate. Many experts say letting your battery discharge or even go red before connecting to the charger somehow damages these new lithium batteries, decreases the charge they can hold and/or lower their lifespan. I am not a chemist, so I will not argue for or against this statement, someone with the appropriate knowledge can chime in and explain either way.
However, I can tell you from experience (and you can see how many smartphones I have owned over the years) many times I leave my battery go to the yellow or red before hooking it up to the charger. Have done this for years on other phones and have never (ever!) experienced any problem with battery not holding full charge or having decreased service life.
AS FOR MY BATTERY SAVING SETTINGS...
I have Always-On mobile data enabled (makes phone more stable IMHO), I don't have IM/Chat, Twiter or Facebook updating at all (have little use for those and can update Facebook manually whenever needed). I have my mail set to download hourly from 0800-2000 and manually during the night, my HTC clock/weather widget refreshing hourly and WeatherBug the same.
Keep my 4G, Hotspot, WiFi and GPS radios off at all times, only turning on when in use. Turned off the ambient light sensor (keeps my screen too bright all the time), changed brightness to 25% indoors and 50% outdoors. I use the HTC and Adroid Power widgets to control my radios, and Brightness Level (CurveFish) widget for the screen. I find these widgets allow for quick and easy control of these settings.
For monitoring what Android does, I installed Android System Info (ElectricSheep) to monitor power consumption and system resource usage. It also has a simple built-in task manager/killer although I rarely if ever use it for anything. To monitor my battery level I installed SysTray Monitor (Creafire AG), it places a small and elegant percent label on the tray to keep tabs of your battery level at all times. All of these apps can be found in the market for free.
And there you have it, hope you find this information useful.