I know its hard, but try to have at least a week off in these holidays - you can't keep trying forever. Next week, maybe start by doing only a little bit, to get back into doing stuff before we go back to school.
Also try to get outside or do exercise for a little bit every day - literally two minutes makes me feel better.
Try to use the holidays as an actual break - I find it so hard to focus as well at the moment.
For motivation, maybe try reminding yourself what your working for - a uni course, a job, yourself, anything...