Common mistakes include cancelling a direct debit before receiving a final bill, ignoring exit fees when switching, and choosing a tariff based on the monthly estimate rather than your actual usage. Do not assume the cheapest deal is automatically suitable, and check whether you qualify for help such as the Warm Home Discount, Council Tax Reduction or broadband social tariffs. Be wary of unsolicited calls promising savings, and check providers and deals independently before sharing personal or bank details. Compare options using reliable sources such as Citizens Advice and GOV.UK, and contact your supplier if you are struggling to pay.