Wills are documents written by the maker making a declaration to the effect of instructing the executor on how to manage his personal estate including distribution to his intended beneficiaries after his death. It can prevent any dispute, thus reduce the need for litigation lawyer.
Any conventional will must also comply with Wills Act 1959. One should choose a trustworthy executor such as their partners. Alternatively, they can appoint a professional executor such as a trust company to carry out the duties.