Since this seems to be a general Tips n Tricks for the Moment, I will post something that really helped my GPS functionality on my Moment here. Although someone else actually posted it deep in a different GPS thread, I wanted to consolidate and summarize it here- in the Tips n Tricks thread..
So... GPS has been really horrible on these phones for a lot of people- including me- to a very bad extent.
I read that if you turn on your Wi-Fi, it really helps your GPS. And it really made a huge difference for me. Turning on my Wi-Fi has made my GPS lock on my accurate location every time since doing that- even inside my house!
I am talking about the Wi-Fi selection under the Wireless Controls settings option. (although I do also have "use wireless networks" and "enable GPS" selected under the Security & Location settings option also.)
Because I DO believe that having my Wi-Fi turned on ALL the time will create a significant drain on my battery, I also downloaded a nifty lil app from the market that allows me to turn my Wi-Fi on and off with the simple press of an icon on my Home Screen. The one I got (and really like) is called WiFi OnOff. I just turn the WiFi on before I juse a GPS based app/ service and then use the lil button to turn it off when I'm done using the GPS.
Using Wi-Fi has really helped my GPS work better, and that app has really made it very simple to turn the Wi-Fi on and off very easily, thus saving my battery when I don't need the Wi-Fi.
FYI, the same creator of the Wi-Fi OnOff app also makes an equally convenient matching icon for Bluetooth OnOff that I use all the time to turn off my Bluetooth if I know that I won't be using my Bluetooth at all that day.