4. Order Your Sources
When deciding how to structure your shiur, take into account the background of sources – when were they written and who by, will influence which order is best to structure a source – if you have the Gur Aryeh (a supercommentary on Rashi) and Rashi, Rashi should come first!
Also make sure that you are building ideas from the roots. Start with pasukim and Mishna/Gemara, then build into Rishonim like Rashi, Ramban, Ramban then Acharonim and Modern thinkers!
If talking about halacha, the Shulchan Aruch & Rema serve as a bottom line, unless there is a relevant more modern source e.g. Rav Rimon explaining the halachot of a slow cooker on shabbat.