想法 (xiǎng fǎ) means an idea, thought, or opinion - the content of what one thinks. 想 means to think and 法 here means way or method, so 想法 is literally a way of thinking. It refers to specific ideas or views (有什么想法, have any ideas?) rather than the abstract capacity to think (思想, sī xiǎng). Common phrases: 分享想法 (share ideas), 好想法 (good idea), 奇怪的想法 (a strange notion). It is close in meaning to 主意 (a plan/idea) but focuses more on the thought itself.