Quick Tip: Buy Apps From Zune Desktop Client Instead Of Phone
This is just a quick tip for those new to WP7.
Purchase and install apps from the Zune Desktop client instead of from your phone when possible. It might not be immediately available to you if you choose to install over the air due to the wait between queuing up and your phone pulling the new app down, but it'll be a lot easier on you if you ever need to hard reset your phone or get a new phone. Apps purchased from the desktop client automatically reinstall themselves in instances where you hard reset or get a new phone whereas those purchased on the phone will have to be individually selected and re-installed from the marketplace.