Old cardboard box + cheapo tin foil + glue = radiator booster (reflects heat back away from wall when placed down back of radiator)
line curtains with fleece blankets (ikea do really cheap fleece blankets, but charity shops are another good source)
if you have a summer and winter duvet, use the summer one as a mattress topper.
thermals, thick woolly socks, fleeces all worn in the house (thermostat set to 14-16c between 5am-8pm)
go to bed earlier - i go at 8.30/9 (obv not to sleep that early!)
close curtains before it gets dark
install draught excluders - patchwork old clothes/ sleeves from old clothes stuffed with other old clothes and sewn (or closed with elastic bands)
warm dilute juice is great to warm up kids (or adults) after being outside (robinsons summer fruits is our favourite)
hmm...can you tell I like to be warm?!
Ones I want to use more this year
slowcooker - cheaper cuts of meat can be used, can make large quantities (well, ours is really too big for the 2 of us!) for freezing,
make more food from scratch - i used to be good, but then became quite unwell and energy levels fell. Getting back on track but its hard work. Im just taking it a day at a time.