Very clearly mention the source of the ideas you discuss.
Example:
Graph Connectivity Algorithms:
Deterministic [ShiVis '84]
Randomized [Gazit '86]
Randomized algorithm borrows from colouring algorithms [Author 'year].
Value addition by you:
If some idea is your own, mention that very explicitly.
If you constructed an example, Say ``I will now show an example that I constructed to explain the theorem''.
If you found a shorter proof, mention that.