Use a chain at least 3/8" in diameter and a key lock with a 3/8" hardened shackle with heel and toe locking.
Pull up any slack in the chain and keep the lock as high off the ground as possible.
Put your lock through the tire and frame.
Consider the cost of replacing your bike when deciding how to protect it. If you have a $1,000 bike, you should spend more on your lock and chain than if your bike cost only $100. One rule of thumb: spend 10% of the cost (i.e. $100 bike - spend $10 on lock & chain).
Choose carefully where and how you park your bike. Choose well-lighted, public places. If you can, park your bike where you can see it.
Register your bike with Police/Security as this may help them recover it if it is stolen.
Report any suspicious activity, especially people seen loitering near bike racks, to Wittenberg Police/Security at 327 - 6231 or 327 - 7307.
About
Campus Security
Parking and Transportation
