本周我们回顾了2009年的软件和DIY，揭开了Windows页面文件的神秘面纱，并想出了一个简单的方法来防止食物粘在锅上。

• Most Popular Free Windows Downloads of 2009 We've featured hundreds of free Windows applicati*** over the course of 2009 that we hoped might bolster your productivity, workflow, or your PC usefulness in one form or another.
• Most Popular Photography Hacks of 2009 Whether making your own lens hood to create custom bokeh, breathing like a sniper to get a blur-free photo, or angling your body to look the best in pictures, we shared some great photography hacks this year.
• Most Popular Free Mac Downloads of 2009 Nothing beats finding just the right application to fill a common need, fix a problem, or boost your productivity. Give yourself an early present this holiday season with 15 of the most popular Mac downloads of 2009.
• Most Popular DIY Projects of 2009 We love DIY projects here at Lifehacker. Whether we're building computers, backyard projects, or turning office supplies into artillery, we're always tinkering. Today we're taking a peek at the most popular DIY projects of 2009.
• Wallpaper Roundup: Holiday Cheer and Happy Snowmen Christmas is less than two weeks away, and if you're inclined to celebrate the holiday season—Christmas or otherwise—it's time to swap out your winter wallpaper for a holiday-themed one.
• Five Best Startup Management Tools You boot up your computer and you wait, and wait... and wait, as all sorts of programs, helper apps, widgets, and remnants of forgotten installati*** load. Grab one of these five popular startup managers and beat back the startup clutter.
• T3Desk Brings 3D Eye-Candy to Your Windows Desktop Windows only: If you want a little extra eye-candy in your Windows management, T3Desk is an alt-tab alternative that gives you 3D windows arrangement and more.
• Top 10 Homemade Versi*** of Things We Love Making your own versi*** of great food and clever gadgets is already rewarding, and if you play your cards right, the homemade route also comes with serious bragging rights.
• Understanding the Windows Pagefile and Why You Shouldn't Disable It As a tech writer, I regularly cringe at all the bad tweaking advice out there, and disabling the system pagefile is often a source of contention among geeks. Let's examine some of the pagefile myths and debunk them once and for all.
• Keep Food from Sticking to Your Skillet with a Simple Trick One of the biggest downers of cooking meat on a skillet is scraping off the aftermath. Cooking weblog Houseboat Eats highlights a simple water trick that helps you find the ideal temperature for cooking without sticking using the power of science.