You might remember the meaning of the character 热 with this easy mnemonic:
Stop slashing (丿) about in the bush, come with your umbrella (扌) quick! We have got no second (乙) chance to heat up the kindle (灬) if the rains got on the little dot (丶) flames!
Using mnemonics to remember the meaning of Chinese characters like has a huge impact on how long to learn Mandarin it takes.