just think of classification of chors. chords 7 and 5 are in a family together (class 1). 4 and 2 are together (class 2). 6 and 3 are together (class 3). You want to always be moving to tonic. so if you have a chord in class 3 then you want to try to get the next chord to be in class 2. You can skip classes but don't go overboard with it. if you do then you tend to lose the tight knitting of a piece. Also, memorize common chord progressions. take the ending of alot of music. it goes like this ii7, I64, V7/V, V7, (bVI6 here if it is romantic otherwise) I. oh and another thing. if you use accidentals. remember this. All accidentals are resolved by step. sharps go up and flats go down. Don't forget to resolve your sevenths also. Remember which note is suppose to be doubled. (root in root position chords, soprano in first inversion chords, and root in second inversion chords)hope this helps and make sense.
oh yeah i'll just jazz up my bach chorale hahaha. cool thanks i shall contemplate all that