The other way to have increased liquidity in an exchange is attracting market makers to the exchange by giving competitive trading fees for giving liquidity to the exchange.
I agree, that's why some exchanges set maker fees lower than taker fees
(maker-taker fee structure)they do it to draw interest of traders to add more liquidity to order books
and tiered fees based on user's monthly trade volume helps to keep user loyal to an exchange
Therefore, as an individual you cannot increase the volume of an exchange. It's up to the exchange to increase the liquidity by doing the tasks mentioned above.
only traders can directly increase liquidity by placing buy/sell orders in the order books
the exchange can set appealing rules or give bonus to encourage them to place orders