1) Fit The Space
If you have a spacious studio with ample room for a wall art installation then you may be fortunate to be able to showcase a diverse array of items, and if spacious enough, perhaps even a feature wall of your favorite products and corresponding images. Conversely, if you studio is more concise then strategically selected images and products will be a must!
The key is to fit the space and avoid having the walls look overcrowded and cluttered with too many items; alternatively, having one item on a wall is great for an art gallery but less desirable as a sales tool in a studio.
Tip- Having a grid system is a great way to have an organized and uncluttered presentation (ie. 2:2, 4:4, triptychs etc.)
2) Show What You Got
A key factor in showcasing products is showing the types of products you wish to highlight and sell; further, showcasing the correct sizes is paramount. For example, it is much more difficult to up-sell to a 24x36 (for example) if your walls only have 16x24 images. The average client will have difficult time imagining how big the size difference will be and will often feel hesitant and/or overwhelmed (from my experience). If your goal is to sell 24x36 products then go big and show what you got as that is what clients will purchase.
Tip- If you are showcasing the differences between a variety of products using the same image and size on different products is a great way to remove potential variables (ie. size) and allows the differences of the products to shine through and be showcased.
3) Don't Be Everything to Everyone
Have your catalog of products be concise. When shopping around for products having too many options can be confusing and potentially overwhelming to clients. Having a product line of 3-5 products allows for more than enough variety for clients to choose without being overwhelmed by the selection process. Offering packages with differing quantities and sizes is a great way to add a little extra variety and gives great potential for up-selling if structured correctly ;)
Tip- Have a variety in your products to make the selection process easier: a high gloss item like an aluminum prints for those who like gloss, a Matte/Satin finish canvas for those who prefer more subtle finishes, for example.
A fantastic way to maximize space and showcase images (and products) is to have a television or computer mount to your wall (usually best located where consultations take place). Having a monitor is a great way to scroll through client images, showcase your website, do a slideshow of images etc. If using a computer/project which has internet access all the better!
Thanks all and hopefully this of use!