Lorelilee, with you on carpets, wooden floors/laminate is awful.
Is the living room the room you're starting with? If it is I'd recommend bulk buying the door handles/light switches for the entire house if you're replacing them (before I moved in DH stupidly bought new light switches for only 2 rooms, by the time he decorated the others they'd been discountinued so he had to rebuy them).
Our carpets are a mix of Brintons & Carpet Right; For our long living room we went for a 'speckled' carpet as the mix of colour breaks it up a bit, and doesn't make it look like we've got a vast expansive living room (plus the colour hides stains really well); www.carpetright.co.uk/ashbourne-rich-velvet-2.html (sorry can't hyperlink to save my life!) is what we've got.
I think in a room of your length you could get away with making one of the end walls a feature wall (helping to 'zone' it as it's going to be multifunctional). We put a massive rug under the dining table/sideboard so it helps distingush the different areas.
If you're doing the entire room, pick whichever item is most important/key to you; the sofa, the walls, tv stand, curtains etc first & then design around that colour.
Because we picked the brown carpet first, we've gone for a netural-ish tone (art deco dark wood furniture, black sofas) with splashes of red (red cushions, curtains, rug, artwork with bits of red & ginger me)!