(any amount is good but ideally you should get at least 30 min on most days), make healthy food choices (see http://www.
Hsph.Harvard.Edu/nutritionsource/what-should-you-eat/pyramid/) & practice good sleep
hygeine (get enough sleep, go to bed & get up at the same time every day). Try to spend some time outside daily, especially when it's sunny. Try keeping a journal.
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