4. Eat, Pray, Kill
There are enough fast food joints, hot dog stands and restaurants dotted around the GTA franchise to take their inclusion in V as a guarantee. And with so many places to replenish your health, theres really no excuse for forgetting to heal before going into a mission. And why wouldnt you partake in a food stuff that can cure bullet-wounds and car crash injuries? I know it can be hard to resist going for that quest icon thats right there on the mini-map, but do take a quick look at your health before you rush in. Nobody wants to dodge bullets on an empty-stomach.