Take a photo of all your expensive possessions, their serial numbers & receipts
Store the photos on Dropbox, Evernote or OneNote (i.e. the cloud/internet) &/or a USB stick or your computer.
If you ever lose something or it’s stolen, knowing the serial & having proof of ownership will greatly help you, the Police & your insurance claim!
OK, so it takes a few minutes every month to do it but it will save you so much time and effort if the worst ever happens!
Also, for mobile phones / tablets etc ensure you right down the IMEI number (International Mobile Station Equipment Identity AKA unique number to your mobile device) as well (dial *#06# and it will display the number!)
Who is likely to look out for your products if they know the full details: