Recapitulation or Conclusion: one or two sentences.

All in all, In short, In a word, In brief, To summarise, To sum up, To recap, In conclusion, On the whole, Altogether, In a nutshell, To cut a long story short

You can use the pattern ‘While there are also other considerations in… I believe the factors mentioned above are the most significant ones. ‘ for ‘how to…’ and ‘what is important…’ questions. For ‘the importance of…’, you can use ‘While there are also other arguments why… I believe the reasons mentioned above are the most significant ones. ‘