Anyone knows how to increase speed on router D-Link DSL-G684T?

if u know post it here or link me to it or to any guide that can be useful for increasing speed

Port forward.

but the question is how
http://portforward.com/ say PC config costs $$

Well Here Is what i did for my router

If you have a low connection a reflector may fix it.

http://www.freeantennas.com/

EZ-12, printed on photo paper for thick stock,
with aluminum foil glued to the sail, provides a substantial boost in
signal.

http://www.rahul.net/dold/clarence/EZ12-windsurfer.jpg

You could put one on the router, and anotheron the PC, if it has a stick
antenna.

Works for any routers.

Buy a new computer.

Even easier, pop your router's bandwidth cherry.

you want him to rape his router