Over summer, I get really lazy, and don't go many

Over summer, I get really lazy, and don't go many places, besides hanging out with friends. During school time I would run 1/4 a mile everday in PE them more exercise. Over summer I get unhealthy and always gain a couple pounds. Well, since I still have like 2 months before high school (yup! eek!) I just wanna know some small, easy things I can do to lose like 5-25 pounds in a little under 2 months. :)

Thanks!