The best way to help prostitution would be to legalize it. Legalizing it would allow it to be regulated and monitored, it would be taken from the street corners and dark alleys and put under the lights for all appropriate people to see. Women could register as independents, join an agency, contribute payroll taxes, etc. There would be less abuse and shady dealings, less abusive (as the woman could report the abuse), less chances of disease (agencies could promote themselves as being “disease free”, employing women who pass an STD test and having rules to prohibit condom-less sex), et cetera.
The most common argument against such action is that it would cause society to collapse with no morals. This is provably false, and is nothing more than baseless claims. The second most common argument is that more women would become prostitutes, and again this is provably false.
Here is one article describing the sex trade in New Zealand, where it is legal. It offers a lot of value into showing the effects of legalization.