Even if you have only a few hours dedicate your time and fasting to God and get some alone time with him in the word and prayer and praise. We are almost constantly bombarded with worldly things and negatives and problems but how we spend our free time is our choice. When you make the decision to focus on God and worshipping and praising him and thanking him and give yourself the time to reinforce your mind and heart with positives and promises and faith you are giving yourself the ability to deal with the worldly stuff and negatives. You can fast by not eating during this time or not drinking your favourite soda or whatever. Just everything you do do it unto the Lord. I love everyone.