It is hard. Some people find PC helpful - me included, though personally I try to avoid it when I'm feeling very bad, because sometimes reading threads here makes my mood plunge if I'm not reasonably stable (but I know that for many people the exact opposite is true). Keeping busy is a good idea, if possible. Not always easy when T's holiday coincides with our own holidays.... Journalling, maybe in the form of weekly letters to T, where you bring up things you would like to talk about that week with T. And trying not to think about the whole break at once, but only about the current week.
This is the first week of my T's holiday, too. He is off until Aug 20.