simplest way- lower your carb intake, limit sodium to 2-3g per day drink and enough water to stay hydrated but don't over do it. you can actually retain water if you over hydrate.
One piece of advice: Stay away from the diuretics unless you really know what you are doing. Those put the hurt on my kidneys so bad that I thought I was going to be on dialysis for life.
Chem supps : if you are on cycle - add winny dries you up, adding clen /t3 cycle dries you up. Know that if you are prone to cramping when adding these supplement with magnesium and taurine will help