"Beautiufully" is often a common misspelling of the word "beautifully". To avoid this mistake, one can try improving by remembering the correct formation: B-E-A-U-T-I-F-U-L-L-Y. Another helpful tip is to break it down into syllables while pronouncing it, to maintain accuracy. Overall, practice and attention to detail are crucial when aiming to spell "beautifully" correctly.