Trip sensors on all doors, windows, and motion sensors. Tie all of it to an alarm in a reinforced metal box in the eaves (out of reach) and tie it to an alarm that summons cops AND one that goes off at the building, as loud as possible. I found that the use of 'hidden beam' type reflectors work better for motion than the generic motion sensor if you have birds about, or squirrels. I had a local alarm company install the basic alarm, and added in an alarm that I bought from the local county (air raid siren or tornado warning I think) at a surplus sale. The audible alarm is loud enough to be heard at least a mile away, and will leave your hearing suspect if you are inside when it triggers. I also had forged steel full eye bolts installed in the slab under the door and the ends, and ran a length of 1/8" thick steel the entire length of the bottom of the door. The door (and steel plate) passes OVER the eye bolts, and get HD round key locks on each end. So some SOB may be able to break thru one of the high mounted windows (sill about 6'5" off ground level) or thru the man door, but the alarm will go off in 30 seconds and I doubt he will hang around. Video is good, too...Fry's Electronics system cost me $400, and has 5 color cameras with decent resolution that I tied to a loop style digital recorder. 3 days record at a time. Finally, to make sure my box doesn't grow legs, I welded a steel frame of of 1/4" wall 4x4, removed the wheels off of the box, put the box on the frame and filled with tools. Outside of hammers and generic tools, EVERYTHING is locked or secured. For tools rarely used, I ran a shelf at the top of the roof line for storage, and lock the ladder to the outside of the building. Inside, anything in place permanently is bolted to the slab. As a last item of security, a 1911 always works well!
