I bought a new loveseat and a new armchair. That match! I have been tucking and retucking slipcovered garage sale chairs and couches for years and I was tired of the work. It's the first new furniture I've ever had and I'm 46. I don't have tables with alot of stuff either. We have one big flat ottoman (which is old but I have matching denim to cover it nicely) and a tray on that for cups of tea and books. Then there are two floor lamps and that's it. So much easier to care for...
The other thing I did recently was to purchase some plastic zip bags for blankets for $1 each at Target. I used the to put, for example, the spare fitted sheet, pillowcases, thermal blanket, and spare comforter cover for my daughter's twin bed in one. I labelled it so she knows where to go to get a change for her bed or another blanket. I did the same for our queen bed and a third has the mattress cover, sheet, pillowcases, and blanket for the full-sized aerobed for company. The linen closet is really simplified now.
Then for the first time ever, I went shopping for new clothes during the Christmas sales. I bought 5 muscle shirts at Target ($35), 5 fitted t-shirts at Forever 21 ($25), and 3 turtleneck pullovers at the Gap (way on sale)($50). I got rid of all the other stuff stuff I owned except a 5 or 6 blouses, 3 sweaters, and jeans. Dressing is a breeze. It's either sleeveless or sleeved but I can layer a blouse over anything now (or not) and just go. I never have to think about it. The colors are mostly jewel tones and black because those look best on me. And each blouse can be worn with almost every color of the pullovers from sleeveless to longsleeve.
My last purchase idea was really my first years ago: two bath towels, hand towels, and washcloths for each person in his/her own color. I once walked into the one bathroom the four of us shared when the kids were about 10 and 12 and there were 7 bath towels hanging up in there. That's when I gave each person his own towels and made the rule that I never wanted to see more than one bath towel at a time from each person in that bathroom! It's been a blessing ever since!
Somehow I keep thinking it's not the things themselves that have helped but the system they have created which has prevented all sorts of other annoyances. So if you already had towels, you could just embroider a different colored flower on them or something to "label" them as belonging to a particular child.