Do your best to plan for all eventualities today, as last minute hold-ups will annoy and frustrate you.
You hate last minute changes to plans and unexpected hick-ups, and although you cant eliminate these entirely, you can do your best to cover all your bases when you plan ahead. Make sure you are allowing for hold-ups in your plans today and figuring in any possible problems. Attend to all the details, as theres nothing worse than finding the small problems are still there at the end.