I would suggest you buy some home decorating magazines and flip through all the pages. ALL the pages. Every time you see something you like (whether it is a bedroom suite, a dining table arrangement, a fireplace, ANY thing and EVERYthing that grabs you and you think "I like that") pull out that page of the magazine. Keep all the torn out pages in a manila folder. After you have accumulated a lot (won't take that long, really, just be sure to get a good variety of magazines--even old magazines, or women's magazines that show room makeover pictures), then take them all out and sort them into groups. By color.
Lots of greens? They go in a pile.
Lots of yellows? They go in a pile.
Lots of orange/red colors? Another pile.
You could also divide them up by groups of palettes like "pastels", "earth tones", bright colors, etc.
You will start to notice a trend. The trick is to look past the EXACT furnishings, and notice how the color FEELS to you. I did something like this and ended up with a muted foresty green color in my bedroom and I LOVE it. It is sooooo soothing and relaxing... exactly what I want in my sleep space.
I noticed that I liked "natural" colors too. I put those in my bathroom. Limestone floors, matching shades for marble countertops, the walls are sort of a taupe mud color. It's BEAUTIFUL and SO easy to decorate. I sometimes throw in pops of lavender or pale pink or pale peach. Even plain cream stands out. And it is easy... it feels CLEAN like the beach. Not stark white which shows every speck of dirt or hair on the floor. :)
Don't think at first. Just start tearing out pictures of things that appeal to you, even if you don't know what it is about the photo that draws you to it. You will pick that information out later when you have compiled a big stack and you will notice trends.