For me, I start by building basic vocabulary and learning simple phrases I can use or apply daily.
So for example, learning how to say the names of various household objects or foods that I use / see regularly. Learning basic greetings, questions, directions, seasons, numbers, dates & time.
I have a dog, he is trained using Korean commands. My grocery lists are written in Korean. I joined a few Korean social groups for various interests I have (like dogs. I've joined the facebook groups for his breed & the Korean registry he is registered with).
One thing that helps me a lot also, is getting *childrens* learning materials in the language. I can sit and work my way through a child's story book, which gives a simple foundation in sentence structure and building efficiency & speed in reading in Hangul. As well as helps build simple vocabulary.
There are also many language learning apps for both Apple & Android devices. And some simple games have a Korean language option, If you know how to play the game already, its simple to read and follow when you change the language from English to Korean. For example: Farmville, Tribes, Harvest Moon and such can be played in Korean.