I think this is the best time of the year to be in the decorating thing, the decoration seasons goes from Halloween to thanksgiving to Christmas and to Hanukah to New years to winter each year.
The first thing that needs to be done in each of these seasons is to get to the basics, be organized. Go ahead and paint furniture where necessary, change rugs etc. Think about household items that you may want to change in the season, for instance; curtains, rugs, pillows sheets and if you need to purchase new item, think of what styles, sizes and colours you may want to use this time around before going out and purchasing. Doing an assessment of the things you need for the coming season, do you have a whole lot of guest to prepare for? Or is it minimal, nothing to worry about? These things need to be considered before assessing table spread, size and measures. Try to decorate within the focal points of each room. When you have done your decorating, do not throw them away, and keep them in case of the need for the next season or the next year.