Today is the start of Cancer Prevention Week and the World Cancer Research Fund has launched a '100 Calorie Challenge'.

Sign up and you'll receive daily prompts and nutritional tips to help cut your calorie intake.

You'll then be encouraged to explore the WCRF website, where you'll find out more about the link between cancer, weight and diet. And of course, there's a gentle nudge to suggest a donation would be nice too.

We really like this campaign. It follows Cancer Research UK's Dryathlon and Alcohol Concern's Dry January. Both were about raising money, but also informing, improving health and affecting behaviour change.

These initiatives are so completely aligned with organisational mission, they have double the impact.

Some campaigns are less linked, more random. Fun activities may engage current supporters and raise funds and therefore have value. But involving a wider audience so integrally in the cause is a much smarter way to communicate meaningfully, on so many more levels, to so many more people.

It's worked on us anyway. We've signed up and in the process learnt a great deal, bought into the WCRF vision and will no doubt convert our biscuit fund into a donation.

Tune in a month from now and we'll all be several hundred calories and a few pounds lighter too. Bonus!

Amazon is working with Carers in Hertfordshire to develop a campaign to improve GPs' understanding of carers and their needs.

Nationally, the number of carers is increasing significantly and reports have found that carers are likely to experience mental health problems, physical illness and injury, and financial difficulties.

Carers in Hertfordshire, based in Hertford, aims to double the number of carers it supports by 2016. GPs play an important role in identifying and referring carers and Amazon is developing a strategy to involve practices across the County.

A detailed communications and engagement plan will be delivered, for implementation during 2013-2014.

Check back for more information as the campaign plan is developed.

Britain's first Youth Crime Commissioner stood down on Tuesday after less than a week in the role after old tweets, which critics said condoned drug taking and violence, caught up with her.

Seventeen year-old Paris Brown admitted that she had fallen into the trap of "behaving with bravado on social networking sites" and hoped that her case "may stand as a learning experience for many other young people".

There's been much debate over whether Paris was right to quit, but there's no doubt that past comments, even those intended as humorous, tongue-in-cheek or ironic, can ruin good reputations and intentions in a moment, especially when thrown into the media spotlight.

Twitter has a key role to play in democratising communications. Those not engaging via social media are in danger of missing a trick. Putting your staff, service users and volunteers forward as representatives of the organisation through their own social media platforms can prove incredibly powerful, creating a more 'personal' identity for your work and fostering new connections. But if you're going to do it, you have to accept the risks that it can bring, as well as the benefits.

Having clear policies in place for all your representatives to read, so they understand the role their comments play and the impact their wider postings can have (like those being developed by the CIPR), is crucial, as is taking the time to plan how you will respond should something negative crop up.

No organisation is immune to a social media crisis but with a bit of forethought and a quick and sincere response it is possible to turn a Twitter storm into a PR opportunity. It's how you manage it that counts.

If you need help with your reputation management strategy please get in touch.