With a shovel.

Then post in the free section on Cragslist:

"..."THIS message is for the thief & his friends that has been
stealing tools and misc items around our neighborhood & town. How does
it feel to get whacked with a long handle shovel by an old man, not
once, but twice? If you want to try again, come on back.

I posted this in the free postings, since this guy thinks everything
in our community and my garage is free? If you have a friend that is
all black and blue, bruised up with a lousy excuse. He may be a
thief!"

http://www.14news.com/story/22058820/boonville-man-fights-off-intruder-then-ridicules-suspect-on-craigslist