I don't want to go all naggy, but vocab is a very important part of learning a language. If you don't know words, you can't speak/write/understand it. So, I made a compilation of vocab words divided into subjects. You should say it out loud, learn the Korean words so you can write and recognize it, and memorize the definition.
Colors
색 (saek) means color. This always comes right after any colors
남색 (namsaek) = navy blue
하얀색 (hayansaek) = white
파란색 (paransaek) = blue
갈색 (galsaek) = brown
보라색 (borasaek) = purple
검정색 (gumjeongsaek) = black
초록색 (choroksaek) = green
주황색 (juhwangsaek) = orange
빨간색 (ppalgansaek) = red
노란색 (noransaek) = yellow
Months
월 (wol) means month. This always comes right after any months.
일월 (ilwol) = January
이월 (yewol) = February
삼월 (samwol) = March
사월 (sawol) = April
오월 (ohwol) = May
유월 (yuwol) = June
칠월 (chilwol) = July
팔월 (palwol) = August
구월 (guwol) = September
시월 (shiwol) = October
십일월 (shipilwol) = November
십이월 (shipyewol) = December
As you may have noticed, the Sino-Korean numberings are used for months. So as long as you know how to count up to twelve in Sino-Korean, all you need to do is add 'wol' at the end and ta-da!
Family Members
할아버지 (halabeoji) = Grandfather (on father's side)
--외할아버지 (oehalabeoji) = Grandfather (on mother's side)
할머니 (halmeoni) = Grandmother (on father's side)
--외할머니 (oehalmeoni) = Grandmother (on mother's side)
*note: The romanization for grandfather/mother on mother's side has an 'oe' in the front but the actual pronounciation is more like 'wae'
아버지 (abeoji) = Father
--아빠 (appa) = Father (informal)
어머니 (eomeoni) = Mother
--엄마 (umma) = Mother (informal)
남편 (nampyeon) = Husband
부인 (buin) = Wife
딸 (ttal) = Daughter
오빠 (oppa) = Older brother (female's perspective)
언니 (unni) = Older sister (female's perspective)
아들 (adeul) = Son
형 (hyung) = Older brother (male's perspective)
누나 (noona) = Older sister (male's perspective)
여동생, 남동생 (yeodongsaeng, namdongsaeng) = Younger sister, younger brother (from both gender's perspectives)
*Note: Romanizations may not be the perfect spelling.