Window blinds and window shades serve many purposes. They provide you with privacy, energy efficiency, and add to the overall beauty of your home. Here's a short list of models and styles so that you have a better idea of the options available to you.
Window Blinds
Horizontal slat window blinds are by far the most common blinds because of their ease of use and space saving properties, but there are many other styles out there to look at. Consider the size and
function of the window or door you need treatments for in order to choose the best blind for you.
Wood blindsWood blinds can be stained to match just about any wood, and can also be painted if you prefer. They can't be beat when it comes to looks, making them one of the most popular choices for homeowners and interior designers.
ShuttersIf you're looking for a more formal appearance, you might want to consider shutters for your window treatments. They aren't as versatile and need a little more room to swing open and shut, but they provide a distinctive look that many homeowners crave.
Vertical blindsVertical window blinds are perfect for large windows and sliding glass doors. They provide excellent window coverage, easy access, and are available in many materials, including wood.
Panel tracksPanel tracks aren't blinds exactly, but they're a close cousin. Think Asian sliding door partitions and you've got the right picture. Panel tracks are excellent choices for large windows and doors, and can be used as room dividers as well. They provide a unique window treatment solution if you're looking for a little something different.
Window Shades
Not to be outdone, window shades provide all the benefits of window blinds with added design possibilities. Here's a few of the most popular designs available to choose from.
Cellular or Honeycomb shadesCellular shades are made with a honeycomb structure that traps air in between the material, making them hands down the most energy efficient window treatment available.
Woven wood shadesSimilar in construction and appearance to the old bamboo, roll up shades. Very attractive and cost effective in any setting.
Roman and roller shadesThese shades are both made from fabric of your choosing, the only difference being how they are retracted. Roman shades are raised in folds while roller shades roll up onto a headrail at the top of the window.
Pleated shadesPleated shades are constructed of thin, crisply pleated material that can be raised or lowered to cover your window. These shades are usually thinner and let in more light, though they can be purchased in darker materials to provide more privacy and sun-screening properties if you so desire.
Interior Designers
If you're looking for window blinds or shades, it's a good idea to talk to an interior designer or window treatment specialist before you purchase. These experts know the ins and outs of everything from energy efficiency to color schemes, and will be able to provide you with sound advice when it comes to which style of blinds or shade will best meet your needs, your home, and your personality. 
Matt Goering, formerly a carpenter and house painter, is a freelance writer for the home improvement industry who has published over 600 articles.