The first step when it comes to preparing for a house clearance is to remove any sentimental item of value that is in the house. For this answer, I assume that you’re using a professional service in which case, they will most likely clear everything in the house. So if there’s something of sentimental value around, this is the part where you remove them.
While some clearance services donate to charity, you can easily do this on your own also beforehand. You can also sell or auction your items if you please.
In cases where you need some items to be stored away separately, you should also endeavor to secure storage. Many companies that offer house clearance service tend to provide storage as an add on, so feel free to check in with them beforehand.
Once you’ve done all this you’re good to go. In case you don’t have one already, you should also make time to properly research the right clearance service for you before you proceed.