You’ve spent hours fine-tuning your PowerPoint. The slides are perfect, it’s just the right length, you’ve practiced your pitch and timed it perfectly, and you even have your suit perfectly pressed. All too often, that precisely when disaster strikes: your laptop battery dies or won’t boot up. Next time, just leave it behind.Heresy you say! Perhaps, but even if you take along the laptop, it’s a good idea to have a backup plan. So put the PowerPoint deck on your iPod or your Treo. If your laptop devolves on you, you’re ready to go. Plus, once you get comfortable with running your presentation off your handheld, you can eschew the laptop entirely. The shoulder with the indentation from the strap on your laptop bag will thank you.