If you're experiencing feelings of distress or despair, including those which could lead to suicide, Samaritans provides confidential non-judgmental emotional support. Lines are open 24 hours a day. Calls are charged at the local rate.

If you're a child or young person and urgently need help, call Childline. Lines are open 24 hours a day. All calls from the UK are free.

Mind is a mental health charity working in England and Wales. The MindinfoLine offers confidential help on a range of mental health issues. Lines are open 9.15am-5.15pm, Monday to Friday. Calls are charged at the local rate.

SAMH, Scotland's leading mental health charity, works to support people who experience mental health problems, homelessness, addictions and other forms of social exclusion.

Depression Alliance works to relieve and prevent depression by providing information and support services including a network of self-help groups. They don't offer a helpline but you can call to request an information pack.

SANE works to improve the quality of life for people affected by mental illness. SANEline is a national out-of-hours telephone helpline offering confidential emotional support and information for people affected by mental health problems. Lines are open 6pm-11pm, every day. Calls are charged at the local rate.

YoungMinds is a national charity committed to improving the mental health and emotional wellbeing of children and young people. If you're a worried parent, call the confidential YoungMinds Parents Information Service. Lines are open 10am-4pm, Monday to Friday, and 6pm-8pm, Wednesdays. All calls from the UK are free.

Together is a national charity working for mental wellbeing offering a wide range of services to support people with mental health needs.

The Mental Health Foundation is a UK charity that provides information, carries out research, and works to improve services for anyone affected by mental health issues.

Moving People is a groundbreaking and diverse programme of national and local activity to combat stigma and discrimination linked to mental health, and improve wellbeing. Their aim is to have a positive impact on the way in which people in England understand mental health.

Harmless is a user led organisation that provides support, information, training and consultancy to people who self harm, their friends and families and professionals.

Contact a Family provides advice and information to families whose children have any kind of disability or additional need, including ADHD.

OCD-UK is the leading national charity, independently working with and for people with Obsessive Compulsive Disorder (OCD).

Anxiety UK offers advice and support as well as access to therapies for sufferers of all anxiety disorders and phobias.

Talk to Frank offers a confidential helpline for straight up, unbiased information about drugs or alcohol. Lines are open 24 hours a day. All calls from the UK are free.

If you seem to be having trouble with your drinking, you may be interested to know more about Alcoholics Anonymous. They offer a confidential helpline. Lines are open 24 hours a day. Calls are charged at the local rate.

beat is a UK charity for people with eating disorders and their families. There are separate confidential helplines - one for adults and one for young people under 25. Under 25s can also text or chat online to a member of the youth team. The adult helpline is open 10.30am-8.30pm, Monday to Friday, and 1pm-4.30pm, Saturdays. The young people's helpline is open 4.30pm-8.30pm, Monday to Friday, and 1pm-4.30pm, Saturdays. All calls from the UK are free.

BBC Health gives online advice on how to choose a six-week exercise and diet plan to suit you.

TimeBank aims to match potential volunteers with volunteering opportunities to match their interests and the time they have available. Registration is free and you can sign up online or over the telephone.

do-it! is a charity offering a free national database of volunteering opportunities in your area and abroad. You can use do it! to search for a voluntary role or read more about volunteering in general.

The BBC Breathing Places campaign offers inspiration to create and care for nature-friendly green spaces where you live.

Mind is a mental health charity working in England and Wales. Their site offers specific advice about the causes of low self-esteem and how it can affect you.

BBC Lifestyle suggests practical exercises to boost your self-esteem and advice on how to improve your self-confidence.