Traditional Chinese characters were organized very well, thanks the intelligent ancestors who created those characters.
Most of Chinese characters were classified by 偏旁部首(radicals).
e.g.
艹 （it's related to plants）：草，花，蕊，蕾，苗……
木 （wood）：木，树，松，森林……
鱼（fish）：鱼，鲑，鳜，鲫，鲤……
心（think,heart)：思想，忍，念，忠……
口（mouth)：吃，喝，唱，叫，喊，咬……
言（it's a traditional character, it's related with talking)：说，语，论，谈……
火（fire)：燃，烧，烛……
水（water)：海，江，河，溪，流，汗，淋……
Too many to list, in short, the radicals can tell what kind of words they are, it's easy for you to get the sense of the words and remember them. 加油！（try hard)