Be clear, straightforward and concise. Know your purpose and audience so your introduction should be in the appropriate register (formal or modified formal). Very rarely are speeches informal.
Make sure to outline the topics you'll be covering in your speech such as 'first I'll ... then ... later' to give an overview and make it easy to follow for listeners.
Use appropriate pronouns; speak in the first, second or third personnarrative where appropriate and address the audience if needed be by using interpersonal features.
The middle bit:
Sectioned off by topics. If you're describing a narrative, use those adverbials of time eg 'several years ago', 'then', 'after', 'consequently'.
If it's a political speech aimed to gain support, you might try making promises and use the cause/effect structure when presenting your arguments.
Use lots of sign posts and disourse markers to help structure your speech. Use the active voice to make your utterances clear. Use rhetorical devices such as triple structure, rhetorical questions, mocking opposition to make yourself look better, repeated sentence starters etc
Keep it brief. Ask for any questions if needed -- if speech is particularly informative. Thank the audience for listening to your drivel.
General pointers: confidence, good eye contact, speak slowly and clearly, be articulate and prepared
Best of luck
Any tips for a good speech please? It's 8 minutes long and includes lots of pauses.
Don't stand in the same spot talking at them, move around. Use your hands and really make it interesting, just think of the speeches you've hated and what they've done wrong!