ebook to get to fans and vents
3) use flashlight to look through vents for the dust (if you cant see the light on the other end, then the vents are clogged up)
4) go outside, get some compressed air (cans or compressor @ 50 PSI) and give the vents a good airing out all directions (concentrating on the vents)
.... you might want to brace the fan blade(s) when airing it out (with anything to prevent it from spinning out too much)
5) go get some Q-tips and swab the fan blades and the area around it
6) then go do a second airing with compressed air (all directions again focusing on the fans and vents) to push out the dust that was dislodged from the Q-tips

7*) Now go use the flashlight again and look through the vents (shine the flashlight from the fan, you look through the other end) for anymore dust clogs.

8) Then start up the notebook... and let the fans cycle up (use the Fan Toggle at max speed if your system has it) to push out any other dust that might have been stuck.

If all goes well you should be able to close up the notebook and...