Spread the paste evenly on the die using a razor or something similar.
If you're lazy like me, just use your finger. You'll get a silver-tipped finger, but IMO I find this method having more control over the spreading and I'm also not comfortable with accidentally scratching the die with something sharp like a razor.

Just revived mine. I cut 2 of my finger just by removing the whole casing ( damn, I haven even started yet ). I was short of 1 nylon washer ( I think that b******* miscalculate 1 washer ) and I also end up using M6 ( m5 out of stock WTF ? ). 1 of the back I had to combine 2 steel washer just to get the same size as the nylon washer. Hope it doesn't break.

But after put everything back, I still got 3 rod then became 2 rod. I lost all my hope and try the final solution and pray that it works

Ts, if you don't mind adding this guide. I was actually reading 3 different guides on how to do x-clamp 

There little trick. You need to overheat the GPU.
There is one major flaw with this approach.  The thermosistor for the overheating protection of the 360 is contained within the CPU.  So the problem is that the CPU overheats without any airflow before the GPU is able to get sufficiently hot to "reflow" the BGA solder connection.

In order to cool the CPU but not the GPU it is again important to have your fan shroud removed.  Now take your fan that IS plugged in and lay it on top of your DVD drive with one of the fan's over the top of the CPU.  This will keep the CPU plenty cool to prevent it from overheating while the GPU.

Power up the console and let it run for 10-15 minit with 3rod WITH FAN BLOWING TO THE CPU. MAKE SURE IT DOESN'T GOES TO 2ROD. IF YOU NEED A BIGGER FAN TO BLOW THE CPU, THEN USE A NORMAL FAN.  After 10-15 minit, off the console and let everything cooldown. Just put back as ts said for temporary and pray it works.

I did this way and i revive my console.