Step 1: do a pushup. An army pushup, not a ninny one!
Step 2: stop at the apex (highest part) of the pushup.
Step 3: now hold it for a minute.
Harder than you thought, right? Well now try to do it for over two minutes. If you're like me, you would've collapsed.
Now do one every day for a year? You won't be Ahnuld, but you'll probably be in better shape then what you started out to be.