1. Start studying in the morning to jump start your learning!
I use DuoLingo for a quick review while I eat breakfast. Other people have also suggested Memrise, LingoDeer, and Anki :) I personally prefer Duolingo but anything helps!
2. Watch and learn!
A common suggestion for improving your Korean is to watch Kdramas and write down every word you don't know. The problem is, Korean dramas are LONG. It can be disheartening to try to watch an hour of a show and be contantly taking notes. I suggest that you instead watch Korean YouTubers because they use vocabulary you'd probably want to know (they speak like humans as opposed to how some people talk in dramas lol!). There are also shorter Web Dramas available that are fun too!
3. Play the name game
Pick a room in your house, like the bathroom. Try to name absolutely everything in that room. Toothbrush, toothpaste, etc. But also what about mirror? How do you say shower head? Bath mat? Tile floor? Once you think you can name everything, move on to verbs - take a bath, clean the mirror, wash your hair, dry the floor. Move on to other rooms in your house! Move out to the street! You'll be amazed at how much you learn!