What salt are you using now?
There are a few good salts out there and what works for one person might not work for the best. One of the biggest things that I can recommend is finding a salt that is going to be readily available to you. For example, I swear by AquaVitro Salinity, but it can not be ordered online, so unless you know your LFS always has it in stock, or can quickly get it in stock, don't even attempt this salt.