My words of advice for today. When you don't think you can, do it anyway.
This weekend after a long week of work, I decided to sleep. ALOT. More than I should have. In result, I was super lazy, which meant no gym or workout what so ever. All the energy was sucked out of me, and going to the gym was the last thing I wanted to do. But when Sunday night rolled around, I super regretted it. I would have felt SO much better if I would have just mustered about some energy and went to the gym.
It's SO hard when you are super tired and you'd much rather catch up on your favorite shows then go to the gym/get in a workout. But my words of advice to you is, kick laziness to the curb, ask God for strength, and get sweatin! It may seem impossible, but trust me, you will feel so much better in the end. Not only will you not feel guilty because you didn't workout, but you will have so much more energy afterwards, and feel happier! One of the best feelings is doing something you didn't think you could do.
So push through, YOU CAN DO IT. Laziness is only there to rob of us being the best that we can be.