Too Many Forums asking about how to improve ones system, etc.

I have been reading so many forum posts lately that are asking for advice on improving ones system.  They ask about amps, preamps, speakers, cables, etc., but the person asking for information does not state what improvements they are looking for.  Recently one person said he did not hear a difference with a particular product but others did.  Well that seems useless to me as I don't know what the other people were hearing with a product that I am familiar with to know how to provide advice.  There are many ways to improve ones system but we need more information to narrow down the advice otherwise you will get too many suggestions from cabling to amps, preamps, etc.  You can improve a component by replacing a few resistors but each of those has a sound so I cannot recommend something if I don't know what exactly you are looking to improve.

Thoughts????