Blanket
A blanket covers the body, so it stands for shelter and rest. Traditional reading likened what covers you to the person who protects you, and read pulling a warm blanket over yourself as a good omen of a comfortable place and good ties. A new blanket means your household improves, and folding or tidying one signals gathering yourself. A wet or heavy blanket, by contrast, means rest is not refreshing you, so look at how you are actually sleeping.
A blanket holds no warmth of its own; it is warm only because of the body under it. Old readings treated the sleeping place as where a household's circumstances show, and measured the bedding against the thickness of the home. The state of the blanket decides the meaning.
Readings by Situation
Pulling a warm blanket over yourself
A good omen of a comfortable place and good ties. Tradition read what covers you as a sheltering hand. Warmth in the scene reads more strongly still.
Getting a new blanket
A sign that your household improves. Tradition read new bedding as a place settling. With a marriage talk or a move ahead, this reads well.
Folding or tidying a blanket
A sign of gathering yourself. Tradition read tidying as shaking off what has gone stale. Read it as a time of tying off what is past.
A wet or heavy blanket
A sign that rest is not refreshing you. Tradition too read damp bedding as a time when energy is pressed down. It also signals looking at how you actually sleep.
A blanket dream says nothing about your actual bedding or your home. A wet blanket does not fix anything bad in place. Still, if you often wake unrefreshed, look at your sleep first.