It's often claimed that today is the most depressing day of the year.
But ITV Daybreak's health editor and Alzheimer's Society supporter, Dr Hilary Jones, has let us in on his top five tips to keep you smiling on Blue Monday.
Go on the run: 'Exercise has been proven to lift your mood and improve well-being.' says Hilary. 'Sticking to a new regime is much easier if you have a goal.
'I've signed up to the Bupa Great South Run in October to keep me motivated over the coming months.'
Get a tailored training programme at bupa.co.uk/running
Go the extra mile for someone else: 'Studies show that acts of kindness for someone else make us feel good too. Get your friends to sponsor you for your run and raise funds for charity.
'I'm running for Alzheimer's Society to support people with dementia and their carers.' Get your charity place at alzheimers.org.uk/greatrun
Be green: 'Connecting with nature through activities like walking and gardening can be as effective as prescription drugs in treating mental distress.'
Be game for a laugh: 'Whether it's watching a favourite film or TV show or going out to a comedy night, laughter is an endorphin trigger and helps to reduce stress. Sometimes laughter really is the best medicine.'
Go bananas: Hilary says bananas contain tryptophan, which the body uses to make the happiness hormone serotonin. They also contain potassium and vitamin B6 levels which can become depleted if you're under stress.
Include leafy greens, energy packed seeds, some oily fish and lots of fresh fruit and vegetables in your diet, and you'll be feeding your mind as well as your body.