Get rid of the SatNav ... yes, really. At a recent meeting I went to one of the attendees turned up nearly half an hour late. He'd got lost. The reason - he was using a SatNav! :)
Now, I'm not saying SatNavs don't have their uses but more often than not people blindly follow them without having a clue where they're going and haven't got a clue what to do when they go wrong or it takes them down a wrong road.
We've all heard stories of lorries getting stuck down narrow dirt tracks, stuck under bridges, drivers ending up in a completely different place to where they intended.
I arrived half an hour early (but then I'm just a smart alec). Here are my tips to arrive on time (other than getting rid of the SatNav).
If coming from a long way away, set off in good time and plan to arrive half an hour early - giving some leeway incase you get delayed.
Check where you're going on Streetmap the day before. This will give you a pretty good map and reference to where you're going.
You can check timing and distance on www.theaa.com Route Planner. Add a bit if you're going to be travelling at peak times.