this happens to me sometimes too, the only real thing you can do to combat this, willpower, you gotta fight the urge to just go back to sleep and instead, get up go to the washroom and awaken yourself to the point of non-grogginess (usually takes me 10 minutes) and then go back to sleep. Theres no tips on willpower that I can give you unfortunetly, you just have to decide whats more important to you, 10-20 extra minutes of sleep, or a possible WILD ? I don't think that will be too hard to answer.