short term memory human

My course covered human interface machine, and discuss about long term memory and short term memory do human has!

long term memory is like "common sense", dog has 4 legs, bird can fly and etc.

and short term memory is ostensibly stores items for only around 30 seconds. It is a temporary potentiation of neural connections that can become long-term memory through the process of rehearsal and meaningful association.

it's so hard for me to memorize something, and i am really hard to recall what i've done.
what i've read, what i've watched, what i've gone through, where i've been to and blablabla..

I read some novels/books, i can be very enjoyed the storyline for only few days, after that, it will totally dissolved in my mind, and i couldn't recall the storyline anymore. (really a failure creature!!)

I watched a lot of movies and drama, hong kong series, taiwan series, US series, but maybe i can only tell you which series i've watched, but for some drama/series, i totally forgot what the synopsis all about. (really a loser, so i think i must blog everything that happened to me)

I travelled to some places/countries :
primary school(standard 2 or 3) to Bei Jing,China with parents.(just remembered i been to THE GREAT WALL and some Kings@Queens graveyard, others forgot already T.T)

primary school(standard 4,5 or 6) to Medan, Indonesia. Been to lake toba then no idea already. SAD!!!!!

then forgot when go to bangkok with family, forgot where we travelled to.

oh my god, i am really live in a short term memory world.

AND I AM REALLY HARD TO MEMORIZE ANY SINGLE THING. SUCH AS LYRICS, I ALSO COULDN'T MAKE IT, HELP ME!!

do anyone knows how to make short term memory easily become long term memory?