QUOTE(cowithgun @ Dec 9 2011, 11:20 AM)
Again, dont worry too much about not much free memory since OS will take care of it for us. But if you still would like to free up more RAM, here is a tips on how to free more memory:
No danger
1) Go to setting, Running services
- Here is list of stuff that always running in background
- You will have widget and stuff
- Identify widget that you dont use, remove it from your Home screen.
Not for novice user
2) In the same Running list, you may see Map, etc which you know you will not use, to really kill it, do this:
- Use a Terminal Emulator or ADB shell
- List all packages
CODE
pm list packages
- Disable package you dont like, for example Google Map (always running in background duh!)
CODE
pm disable com.google.android.apps.maps
This will permanently disable the App, you cant even see it anymore, no more using your precious RAM, until you enable it back:
CODE
pm enable com.google.android.apps.maps
Personally, I like having those widget in my home screen. I didn't disable any of them. What's the point of having a powerful handphone if you cannot use some fancy stuff?

if you dont want to mess with adb commands, you can also use some apps from the market to disable the apps but you need to root your device first.
Antek AppManager - free, add supported
Titanium Backup - $$
or, if you are rooted and you want to do it manually, you can use any filemanager that can use root access to see system/app folder
you can manually rename / remove / backup *.apk and *.odex files for apps that you don't need.
i suggest you backup these files to another folder, on your mem card for e.g.
backing up is a better option since you can restore files if you need some apps or you remove some important files and Android starts FC'ing.