All of the major (and some of the minor) gaming-gear manufacturers have developed their own mouse-control customization software, which usually encompasses advanced macro programming. Often, the software also enables you to control and customize a gaming keyboard of the same brand. In addition to recording macro commands, these software dashboards let you activate premade, game-specific profiles; create your own profiles; and adjust any on-mouse lighting/LED bling. Many also offer presets for non-gaming use, letting you leverage your mouse's programmability in Excel or Photoshop when you're not blowing up starships or hapless zombies.
Many PC gamers rely on a high-tech gaming mouse for fast, precise aim in FPS and other games. These mice can also allow for more comfort than PC gaming controllers during extended game sessions, with less cramping in the hand and fingers, especially when paired with complementary gaming keyboards. And since a gamer mouse is, of course, a mouse, it can also perform double duty for everyday computing.
Dell Home, via its Member Purchase Program, offers its Dell 15.6" Laptop Gaming Backpack in Black/Red for $28.49 with free shipping. That's tied with our expired mention from four days ago as the lowest price we've seen for this bag. (It's the best deal we could find now by $20.) It accommodates laptops with up to 15.6" screens and features a shock-absorbent EVA molded front shield, adjustable shoulder straps, and a deployable rain cover.