If a laptop is well ventilated & cooling is working as intended (no dust/dried thermal paste etc) an cooling pad wont help much, more like 1-3c.
But i would still say that a cooling pad is a must-have for a laptop, for example you can keep it on your bed/lap without "suffocating" & overheating it.
If your laptop has a dust-filter, remove it.
I'm myself an Y510P owner, and removing the dust filter dropped my gpu #1&2 temperatures by ~8c and cpu by ~5c.
And try to undervolt the cpu, it helps by few degrees.
Your welcome.
P.S. There isnt really a cheap way to cool a laptop
dramatically, but these should help a bit.