@Jordundundun-02 plan plan PLAN your story chapter by chapter!! Always have a semi detailed plan on what you're going to write every chapter. For example with my current book Those Three Boys I have every chapter mapped out to a T with details on the plot, what the character would think, what development he would go through etc. doing it this way allows you to see where you want the story to go and eliminates the problem of you not knowing what to write (:
When I get into writer's block, I just stop writing and try and do something else (or I start an entirely new project). I try to do things that would jog my inspiration, eg I write romance books so I watch romance movies, tv shows, read other books (BIG TIP--READING OTHER PPLS BOOKS WORKS LIKE A CHARM) and reflect on my own dating life. (:
I hoped that helped! If you need more just ask fam xx