Well since I work for a home interest mag (not Living etc which I find too expensive and impractical - sorry)
DON'T DO A CREAM CARPET!! I did a beigey colour recently with a great texture and even that seems to get dirty easily. Try to find a carpet with pattern, not the swirly horrific 70s stuff, but there are nice ones with textures and flecks of colour.
Secondly decide what colours you are drawn to. For instance I hate green, I couldn't live with it, whereas others love cool pale colours, I need warm strong colours. My house is all deep blue, bright yellow, strong red etc. The living room is creamy, but the sofas are deep terracotta and we have a huge beautiful rug and dark wood furniture so It doesn't look too plain.
With a cream sofa you could go all cool and calm with pale green or a china blue, or you could go strong and contrast a deep red wall with cream heavy curtains and cream sofa.
Personally I would buy a few mags and see which schemes you are drawn to. Then if you notice a theme between them, look at why you like them, is it style or colour. By now you should have an idea of a colour or if you want a traditional or modern look. Fabrics are also a great place to look, go to John Lewis and get loads of samples around your colours that you like, and slowly as someone said, get a mood board together. It really does help. I had Carpet, wallpaper samples when I went shopping as I could get teh best idea for lights etc that would work.
Good Luck