Why is indulgence often frowned upon? As if feeling good about one's self and enjoying the luxuries the world has to offer is a sin. Must suffering really be a necessary part of life, if it can be avoided by simple indulgent activities. That would be the opposite of indulgence would it not? A personal subjugation of every possible enjoyment to a hard working existence, only managing to indulge with guilty consequence.
I say that if you already have the willpower to put effort into necessary and potentially unenjoyable work, then you are entirely permitted to indulge as much as possible. Eat as much chocolate, watch as much crap television, sleep in as long as you like, stay in bed for a whole day, spend hours doing a hobby. Feel wonderful afterwards and replenished by a day or so of luxury that you have not just allowed yourself but have taken as a mandatory duty to yourself. There is no question of guilt because pleasure is your privilege, a right. It is not even a treat, it is only the natural inclination towards indulgence that will probably make you very relaxed and content.
So please, please indulge yourself. You only have yourself to please.