I've just discover this great 'sport', but actually, I so dumb that I can't golf right!

for example, I've tried the Roman-Decimal code golf challenge, but I ended up with a code around 200 bytes, wich is far away the 59 record.

Where can I learn to code golf right?

If you wanna look my code:

#!perl
$a=uc($ARGV[0]);
%y=(I,1,V,5,X,10,L,50,C,100,D,500,M,1000);
for(;$i<length($a);) {
    $H=$y{substr($a,$i,1)};
    $L=$y{substr($a,++$i,1)};
    $H < $L?$H*=-1:$H;
    $m+=$H;
}
print "$m\n";
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