Do NOT feed the same food every day, give a bit of variety where possible.
Do NOT drop the tortoise, it can kill it.
Do NOT let it near garden ponds, tortoises drown.
Do NOT let them get caught out by frost, it can cause serious damage.
Do NOT mow your lawn until you know where tortoise is.
Remember they can climb netting.
If it can see through a hole in the fence, it will try and get through the fence.
When you put small tortoises out in the summer protect them from predators.( crows / magpies cats / dogs / foxes ).
Learn more about what you need to provide for your tortoise