Did you know that some garden tools are sold unsharpened? When you buy a new tool for your garden be sure to sharpen it before you use it or you will be working a lot harder than necessary.
Check the internet for some great instructional videos for sharpening various garden tools. One caution though, it isn't necessary or even necessarily advisable to use a grinder to sharpen your garden tools. A file does a fine job, a few swipes with a good file will sharpen your garden tool and make your labors in your garden much more efficient.