How can I lose weight without the systems, diets, or pills?

Hi everyone. I’m 5’6 and i’m about 162. 5 months or so ago i used to be 180 so since then i’ve lost 20 lbs, but for the past month or two i’ve lost basically nothing. I eat healthy most of the time and always work out. I sleep well and drink lots of water. How can I lose weight fast without the systems, diets, or pills? I know everything that your suppose to know about weight lose, but for me nothings happening.