Keep it simple- Trends in color should be done is small increments that you test before you commit. In other words if you're thinking of painting a wall in some wild blue turquoise color, try painting only one wall in the color first and living with it before you commit the whole room to the color. If you really want to play it safe, paint a piece of paint-able wall paper in the color and hang it to your wall for a week or so and see if it works with you. This is especially handy in a room with changing light from many windows..colors change color in different lighting situations.
Make sure it's changeable- If you must go with a trend it should be one that can change easily. Throw pillows, area rugs, slipcovers, all are things that can be brought in and taken out. Never invest in a trend that is extremely costly and/or hard to remove. Anything that has to be permanently affixed should be given careful thought. We are already seeing now where small glass tile backsplashes are on their way out. This was one of those trends that may come back and bite you later on. Research classic designs to find a better timeless fit for your decorating needs.
Here's some fine examples of using a bold color choice in your home in a safe way, this trend is becoming popular as we speak, Turquoise is a hot color right now:
If it costs a lot, wait, hesitate and wait some more- Big items cost big money, big installations, etc are all red flags in design. Refrain from jumping on bandwagons that promote colors and finishes that have not been deemed classic. The eighties had their brass age, we don't want to go back to that, especially the 'imitation' brass age. For more on trends that are safe to use, see: http://www.examiner.com/article/how-to-use-trends-d-cor-without-regretting-it-later
Good trends-movable, changeable, removable, Bad Trends- fake anything, imitation anything, if everyone is putting it in, wait..wait...wait....Ugly trends- google decorating trends from the decades, 'nuf said.