How can I boost my internet wifi signal?

3 possible solutions: high gain directional antennas, wireless bridge, or wireless repeater. All have potential pitfalls. High gain antennas may not be helpful in your situation if there is a substantial obstacle between equipment locations. Wireless bridges tend to lower overall available bandwidth and increase system latency. They can also be difficult to configure and usually need to be used in single vendor wireless equipment networks as every vendor seems to implement WDS (Wireless distribution Service) differently. Hawking makes a wireless repeater that avoids most of these pitfalls, but it is a unique solution outside of 802.11 standards and has a poor continuous availability rate in real world environments. It is essentially, a WiFi client and router/AP that can be used to extend WiFi range. The best possible solution involves cabling as WiFi is designed to fail and it will almost never do so at a convenient time for the user.

If you have an antenna on your router, you need to point it so it is pointed horizontally. The wifi signal radiates out in the shape of a doughnut, as if the antenna was poking the hole in the doughnut. You wouldn't use a repeater, you would use a bridge and it does not need a cable. A repeater is specifically access point to access point and would give you a wired connection in your room. Mmmmm... donuts.

buy a better router B/G/N gigabit 10/100/1000 and a better wireless card,but if you don't have a good internet speed you can't do anything more.

u cant

try stealing your neighbours wifi

Your could add a repeater, etc. However, the first thing I would try is to change the router's antenna from a vertical position to a horizontal one. That may help the signal a bit, enough to make it usable...