I take it there are no sibings or cousins to help you out? It's really tough having to do all this by yourself. Some things like raiding her pantry or any consumables is much easier and practical. But memorable stuff that only means something to you and your mum won't mean much to anyone else. You almost feel guilty throwing them away. Hopefully friends and family will pick up a lot of things. Personally I think as long as they go to someone who appreciates it, then it retains it's value and worth.