I think we all have had a bike stolen or know someone who has. Since the days are getting shorter by a whopping 14 minutes a day and the nights are longer you need to be thinking about keeping your bike your’s and not some thieving scumbag’s.
The best defence is to keep your bike out of sight. If they can’t see it they can’t nick it. This isn’t really a problem if you have access to a garage or similar lock up. If you do have a garage then consider putting in a decent ground anchor or an intruder area alarm system.
I am a big fan of security products that are alarmed. Thieves can spend a good hour working on getting your chain off and as long as they can do it quietly they don’t care. If there is a 110 Db alarm going off then they tend to run off and you get to keep your bike.
Following the vein of keeping your bike out of sight, if you don’t have access to a garage and you have to keep your bike in your garden or out on the front then get it covered up with a motorcycle cover, keeps the rain off and deters opportunistic thieves and vandals. At this point it is still advisable to secure your bike with a good quality chain or similar. Again if you can get it to make noise then all the better, a decent disc lock alarm is always a good idea for this as it immobilises your bike and alarms it. Additionally it fits under your seat when travelling too! A lot of the time the cost of such equipment can be offset by reductions in your insurance premium particularly THATCHAM APPROVED SYSTEMS.