INTRODUCTION
Well ... (to introduce a remark or to take time to think)
As far as ... is concerned (formal) / If we are talking (informal) ... (when you introduce a new topic)
CONCLUSION
Basically Fondamentalmente (Conversation filler: when you want to introduce the most important aspect of something)
So / Therefore (to introduce a logical result)
On the whole / In general Nel complesso (to make a general statement)
Overall Complessivamente (to make a final concluding statement)
All in all / All things considered Tutto sommato
Actually / At the end of the day / In the end / In conclusion Alla fine (shows contrast: to give an unexpected or surprising response)
In other words In altre parole
To cut a long story short Per farla breve
LINK
Anyway / Anyhow Comunque (to confirm or support a point or an idea just mentioned in a conversation)
Alternatively (to provide an alternative idea)
In fact / Even better In effetti / Anche meglio (to modify a previous statement, if you want to be more precise)
However / Yet Tuttavia / Ancora (to make a contrast)
Though / Nevertheless Anche se, sebbene, tuttavia (to make a contrast. Though normally goes at the end of the sentences)
In addition / Furthermore / Moreover
On top of that / What's more Inoltre / Cosa c'è di più (to introduce an additional point)
All things considered
For example / For instance
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Eventually Infine
Finally Finalmente