Some of the common mistakes when either drafting a Will, or if you already have a Will, can include;
The Will being out of date and not reflecting major changes in your life;
Getting married, which automatically revokes your Will, and not making a new Will;
Not changing your Will upon separation or divorce;
The hidden Will. It is important tell the Executors or potential beneficiaries where the original is located. Failing to do so can lead to situations such as people assuming there is no Will thus the deceased is treated as intestate;
Ideally your original Will should be stored in a safe place, such as a bank safety deposit box or with your solicitor.