Fabric softener. I stopped using it because DP had itchy skin and we were trying to eliminate possible causes. Have not used it for 6+ months and it's brilliant. I don't need to clean the washing machine drawer as often either!
Rice cooker. Used to rely on it heavily but when it packed in I just started cooking rice on the stove and let it steam at the end with a tea towel. Space is limited in my kitchen so I won't be replacing it, but I don't miss it as much as I thought I would.
Would love to hear what others "do without" 