Ten is such a workable number. Not too much, not too little. Surely you could find ten things a day--every day, that you can get rid of. It allows for lighter days where you spend just a few minutes decluttering an "easy ten" and yet gives room for the more ambitious days where you really get cut-throat about it.
A few friends of mine were discussing this and one lady teased her twin sister saying, "Hey! I bet you could find ten things to toss just in your purse alone!"
Challenge the children to find ten toys to throw away or take to goodwill.
Find ten things in your kitchen that aren't "paying their rent" and don't justify their existence in the cupboard.
Find ten clothing items you've not worn in a year's time.
Resist the urge to over zealously exceed ten in the first few days. Keep it light, fun, and maintainable. The nice thing about ten-a-day is that it is maintainable and can become a daily habit.
Here's Jessica Gottleib's blog that sparked the idea! And my friend Chautona chronicled her first three days of decluttering by tens: Here's Chautona's day one, day two, and day three.
Ten a day--in two weeks you'll have gotten rid of 140 bits of clutter!
Domestic Chaos Tamer and Homeschool Mom of Five, Dell writes about home, heart and hearth.
