Best way to resume regular exercise?

I've been lazy for a few months, and just tonight tried to do a bit of exercise. Is there a best way to resume regular exercise for a guy who can barely do twenty push ups?

Don't go from being sedentary to a work-out freak all at once, you need to ease into these things slowly Start with about 10 minutes per day, then increase it by about 2 minutes every additional day, until you're at the physical activity level you want to be at. That's all I can say, patience is key, in time, you'll get fit again. And always remember to streatch before and after a workout, which prevents injury. This is especially important for you, seeing as you havn't worked out in a while, which makes you more vulnerable to injury. And you need to do a combo of heart-pumping aerobic and cardio workouts, along with muscle building workouts, like weight lifting or crunches. That's the best way, anyhow, good luck, peace.