Which would you rather have on your tombstone: 'watched the complete boxed set of Mad Men' or 'wrote a novel'?
Writers watch television, of course they do (lunchtime wouldn't be lunch without Bargain Hunt IMO) but only after they've done the writing, not before. If you've had a heavy day at work then coming home and vegging out on the sofa is attractive, but first try sitting down to write for just 10 minutes. You will feel much much better for it. Promise. (You can always make watching the boxed set of Mad Men your writing reward.)
Which would you rather have on your tombstone: 'her children's socks were always ironed' or 'wrote a novel'?
A certain amount of time has to be spent on domesticity unless you want to live in a slum but surprising amounts can be ditched. Ironing can go - buy stuff that doesn't need it. It's not child abuse to train your children to tidy up after themselves, and they can learn to use the washing machine and hoover and load the dish washer.
Which would you rather have on your tombstone: 'went to parties' or 'wrote a novel'?
Speaking from experience, life goes on once you ditch dinner parties and the like. You have fewer acquaintances, but that seems a fair trade off to me. Things like Twitter and Facebook can give the illusion of a social life, but they're also time sucks. Use a kitchen timer.
So, television, domesticity and socialising are my top 3 time sucks. What about yours?