Fevers are your body fighting the infection so unless it gets too high you should just let it do it’s thing. Keeping the fever will shorten the duration of a mild or moderate illness. If your fever gets up to 102-103f or ~39c take medicine to reduce it, if it hits 105f or 40c then you are in danger of cooking you brain and should go to the ER. Stay well hydrated, getting some electrolytes is a good idea if you are sweating more than usual or vomiting. Eat regularly, your body is using extra calories to fight the infection so even if you activity level is lower you need the same or a little more calories than normal. The more balanced your diet the better. Have something to do. Don’t just focus on the illness and lay around getting bored, do some light housework, engage is a light hobby, catch up on some TV or movies, replay an old favorite video game. Anything to keep your mind engaged and to make the time pass faster.