What are the ways of ensuring safety in the home?

Close all the doors before you leave out, keep automatic lights that switches off and on in the morning and evening. If you happen to miss your key completely change the lock. More tips for home security are available at the link below.

However, I think a home security system is also necessary as it will keep monitoring your home all around for 24 hours.

A "Link 1" attached to this post, you can find some qualified equipment.

I am not sure what the about author meant by you can find some satisfied equipments, I don't recommend one product in particular. I like the Honeywell systems, but I think most alarm companies are using those these days. Do some research in your area and find out which company is locally monitored. Ask how much time is allowed between the alarm sounding and them calling. How many times they will let the phone ring before sending a response. Things of this nature. For more info go to "Link 2" attached to this post.