[Nexus 10 Q&A, Help & Troubleshooting] EniGmA1987:
In ClockWorkMod, make sure that /data is mounted

Then download the Android SDK: http://developer.android.com/sdk/index.html

I usually put all the files just in C:/android-sdk-windows

Once you have it all there open up the SDK Manager and download all the additional files needed. You probably only need to download "Android SDK Tools" and "Android SDK Platform-tools", but I always download the other files for whatever version of Android I am running, in our case Android 4.2. That way I have them if I need to do something else.

Once downloaded, open the Android-sdk-windows/platform-tools directory. copy:

adb.exe

adbWinApi.dll

adbWinUsbApi.dll

fastboot.exe

to your base C:/Android-SDK-Windows directory.

Now open command prompt from Start -> run

type: cd C:/Android-SDK-Windows

type: "adb devices" and it should list your tablet. It will actually say something with your devices serial number and then "Recovery" after it, showing your tablet is in recovery. If you dont see this then you either dont have your tablet mounted right from in the Recovery, ClockWorkMod is stupid, or you dont have working adb drivers.

Now copy the ROM you want to flash to C:/Android-SDK-Windows

Then type: "adb push blahblahblah.zip /data/media/0"

That should push the ROM to the root of your SD card. Give it time, it takes a while to push a ROM file. Once it is done, flash the ROM.

That *should* put it in the right spot where it looks like it is on your "internal storage" (what you see when navigating files within the ROM). If you dont see the ROM in clockworkMod then keep navigating back to the root of your internal storage and then open up "data", then "media", then "0" and you should see it. If you still cant find the ROM, push it again but just use "/data/media" as the location.

I just did all these steps myself to verify I remembered it all correct and I was able to successfully copy a ROM and find it on my tablet to flash by doing everything I just listed above. SO you should be good to go if you follow all those steps properly. I know it looks like a lot of work, but it really isnt and will go quite fast. Most of it is just the setup for getting ADB and Fastboot ready to use.

For a ROM to install, I would recommend to someone new like you either of these:

http://xdaforums.com/showthread.php?t=2071082

^^^^^ That one is pretty close to the stock ROM with a few fixes and a couple extra features

or: http://xdaforums.com/showthread.php?t=2071082

^^^^^ This one is pretty much CyanogenMod 10.1, but built by a different guy and not pulling every new thing from CM, just the "cherry picks" of features. It tends to be a bit more stable and less buggy than the real CM10.1 nightly's

And for a kernel you can flash and forget you will want to try this one:

http://xdaforums.com/showthread.php?t=2098157

^^^^^ To flash that you will want to do a similar thing as how you pushed the ROM to your device. Only this time you will copy the kernels' "boot-r4.img" file into your android-adk-windows directory and use the command: "fastboot flash boot boot-r4.img"

While I enjoy the KTManta kernel more, it does require a bit of tweaking to get running perfect. Which is one of the things I like about it because of all the options to tweak. But for someone just learning this stuff that would be a bad thing, so Franco's kernel is much better than stock and doesnt require you to adjust anything once it is flashed to your tablet.