Remember the mini-skirt principle when briefing - short enough to maintain a healthy level of interest but long enough to cover the bare essentials (sorry ladies).
I think briefing threats is a very good idea, especially single pilot IFR. Most airlines now cover threats at the end of a brief - the things that are out to kill you. Terrain, black hole departures/approaches (especially non-precision), traffic etc. Ask yourself "what is different about this departure?" and verbalise it to yourself.