If you decide you want contents insurance, you will need to compile an inventory for your insurance company. An inventory is a detailed list of things in your home that you want to be insured for. Having an inventory helps the insurance company establish the level of insurance you require, as well as making it easier should you have to make a claim.
To compile an inventory you should record each item in your house, providing a description, quantity and an estimated price. Also remember to check cupboards, garages and sheds etc.
If you have antiques in your home, you may want to get these valued by an expert in that field.
It is also important that you inform your insurance company of anything you buy that is of significant value. Likewise, let them know of anything you sell that you have listed on the inventory. It is also advisable to retain receipts for any such items.