My friends know that I suck at balancing my reads 💀 I would start a manga just to never finish it and pick a new one. I do try to be consistent with 70-80% of my ongoing reads. If they're monthly mangas, I usually I'm uptodate (sometimes I would let the chapters accumulate and binge read. Depends on the type of story they are tbh). If they have weekly release, I would go months without reading and then binge read one day. But it also depends on my mood tbh. Some days I read A LOT, some I read 1 or 3 chapters. I think that if you like/live a story enough, even if you start a new one, you will eventually come back to it... I only drop stuff I become uninterested in or bored of. BTW my only hobbies are anime and manga so maybe that's why. I'm actually envious of others who have more going on their lives, so don't take after me 😂 just read at your own pace and capacity.