For anything and everything else in life everyone (every entity) goes through good times and bad times. So to stay positive during tough times know that to see anything to success you have to go through rough rides, you have to stick it out focused on the ultimate result or objective. Without a clear objective when you face challenges along the way it is difficult to stay positive. The excitement (or reward) brought about realising the ultimate objective will regenerate that hope or positive mindset needed to keep on going. This is applicable to anything whether it's school, relationships, leading a team, working hard to be the best student or losing weight. Remember the old adage : the bigger the challenge the sweeter the victory.