Hasty research leads to brick walls, lineages that make no sense, and pedigrees that say things about an ancestor that never actually happened.
There is no rush to the vast majority of genealogical research. Take your time. Make certain you really do have the same person in place A that you think you have in place B. Ask yourself if that family connection is logical and does that "far-fetched" tale really make sense. You can also reduce the chance of this sort of mistake by using online trees as clues, not grabbing the first match that appears "close," and giving yourself some "soak time" between making a conclusion and using it to begin more research.