Sleep

Sleep is not only required to achieve anything great, by providing energy to produce, it also helps with our attitude. It is difficult to keep our negative talk in check when we're tired as it requires energy to do so.

Sleep also help reduce stress, repair the body and keeps ourselves looking young. If you don't get your 8 hours of sleep every night - try it and see if you notice an improvement in your day (or if you still need that morning coffee).