Spend some time on bosnianbill's Youtube channel and you'll definitely get some tips. In particular, I'd recommend these videos: Buying Security: https://www.y

Spend some time on bosnianbill's Youtube channel and you'll definitely get some tips. In particular, I'd recommend these videos: Buying Security: https://www.youtube.com/watch?v=u_7GLxmyaXM https://www.youtube.com/watch?v=u_7GLxmyaXM Choosing a high Security Lock: https://www.youtube.com/watch?v=nsJZ_kKjXcE https://www.youtube.com/watch?v=nsJZ_kKjXcE (Be ware of about 2 minutes 30 seconds of sarcasm in the last one!) Otherwise, browse through the rest of his videos, skipping the challenge locks unless it's something that fascinates you: https://www.youtube.com/user/bosnianbill/videos https://www.youtube.com/user/bosnianbill/videos Essentially, cheap locks can be bypassed very easily (almost anything by Masterlock). More expensive locks ($60+) will have more pins, making them harder to pick, and often have replaceable cores. Of course, security isn't just about the lock, which is addressed in the first video. Hope this gives you a starting point!