PROGRAMMING TRICKS [SCRIPTING]

I have hard time remembering scripts and verses for programming.
Rereferencing the glossary and documentations for the right codes wastes my time since i am still doing my day job.

What are all the programming tricks/mnemonics to memorize all the codes?
DO you write on notes on your left?
Like writing music sheets?

Do solve calculations on paper? Print out stuffs?

Thanks.