Sure, there are common ways to arrange a sofa and loveseat, but keep in mind that each room and personal style are slightly different. Don't be afraid to be unconventional in your configuration- do what works for your space and for your own unique style!
You can arrange a sofa and loveseat in an L shape around a focal point, such as a TV, fireplace or window.
Here are some great ideas! Add two accent chairs and you can form a U shape. Or you can arrange a sofa with two loveseats facing each other and put a coffee table or ottoman in the middle.
No matter your configuration of choice, make sure there is enough space between your furniture so people can easily walk through. And there you go, your furniture is in place and ready to go!