Learned in rehab that electric blankets are bad so never used one, a down comforter work best. Sometimes after coming home in the winter was never able to get my lower body to warm up for hours. To negate this would nuke a towel and put it between my knees. The towel wouldn't be too hot to burn me but would generate heat where it was needed.
Have now found the best and most efficient way to stay warm is to wear a wool cap when wanting to stay warm.
May look funny, don't care, keeps me warm.