Many women want the “formula” – just tell me what to do, and not do, to make chatzos, and I'll do it. As tempting as it is for us to give out such a prescription, it is not wise, because every family is different. Some women work full time outside of the house, others work in the house. Some women are mothers to little kids, and others are bubbes with married children and grandchildren visiting for Shabbos. Some women are married to men who insist on fresh food, and other women rely upon their freezer. Some women are naturally very organized and calm, and others are more scattered and chaotic in their approach to Shabbos preparation. Some women LOVE the adrenalin rush of erev Shabbos preparations, and others LOVE the calm of a house completely ready for Shabbos Friday morning. Your way is not your neighbor's way, and all ways that lead to Hashem and kedusha are welcomed and encouraged. Do not look for THE way, but do look for YOUR way.
Having said that, there are a few basic ideas to keep in mind when aiming to be ready for Chatzos:
Try to do as much as you can earlier in the week. If you don't like to cook food ahead of time and freeze it, then look for other things you can do clear up time later in the week - such as shopping, laundry, ironing, etc. It is very difficult to be ready for Chatzos on Erev Shabbos if you've done no preparations ahead of time.
The challenge for many people is to get rid of the ‘just one more’ temptation, as in, I will make just one more cake, salad, side dish. These extras tend to throw off the entire day.