How to make the handbrake more effective?

[heshan]

Guys, no matter how much I tighten the cable from the adjuster near the lever, my rear wheels won't lock up?

I assume its due to the following reasons:

1. Rear Disc worn out
2. Cable not taut enough
3. Pistons are not working hard enough in the calipers
4. Bad brake pads

Guys any suggestions on how to improve this? I really would like to get the rear sideways using the handbrake and not just with power.. With a small and crowded roads in Sri Lanka its really dangerous..

Please help.

thanks,
heshan.