Water the plant well so that the soil sticks together. Knock the plant gently out of the pot and inspect the root system. If you have a really tight root ball, you may need to repot to the next size container. Repot the plants in a sterile soil mix available at any garden center or nursery. I prefer light mixes that have good water holding capacity.
Many bargain potting soils can become heavy and hold too much water.
Lighter soils may be a little more expensive, but they provide superior aeration, and water and nutrient holding capacity. If the container is as large as you want to handle, trim both the roots and plant. If the plants have been outside, inspect them closely to be sure they are not harboring insect pests. You will be quite embarrassed when you invite the preacher over for dinner and roaches come crawling out to partake of the pot roast. Remove any diseased or dead foliage and pinch back growth to make a tidy appearance.