Boost Your Energy By Jonny Bowden (Fair Winds Press, £12.99)
In a nutshell: Read on for 135 tips for recharging your batteries, divided into categories: eating, exercise, supplements, combating stress, lifestyle changes. They range from straightforward nuggets - green tea is more energising than coffee and interval training can supercharge your day - to more in-depth advice, such as a section on how to speak up for yourself.
The best tip: Tackle the biggest, ugliest task first, so you don't waste precious time and energy worrying about it.
Are You Tired and Wired? By Marcelle Pick (Hay House, £12.99)
In a nutshell: The idea is that stuffing too much into your day overloads your adrenal glands - the ones that release stress hormones - so you wake up exhausted and reach for sugar and caffeine to compensate. The author calls it 'adrenal fatigue'. The first couple of chapters explain the condition, then there's a 30-day food and supplement plan to beat it.
The best tip: Take an 'electronic Sabbath' one day a week to give yourself time off from the nagging of your computer and smart phone.
The Fatigue Solution By Dr Eva Cwynar (Hay House, £10.99)
In a nutshell: The author, a hormone specialist, explains eight steps to help deal with fatigue - whether it's caused by your diet, a lack of sleep or your hormones. There are case studies and recipes, plus a questionnaire to see how toxic you are.
The best tip: Eat every three to four hours and have protein at every meal to keep your hormones and blood sugar on an even keel.
Beat Stress and Fatigue By Patrick Holford (Piatkus, £8.99)
In a nutshell: Avoid sudden slumps by following a low-GI diet that releases energy gradually into your blood stream, and get enough energy-providing vitamins, co-enzyme Q-10, iron and zinc.
The best tip: 15 minutes of exercise first thing gets your digestive system ready for breakfast.