When it comes to choosing a best and reliable security system for your home, you must be very careful and meticulous. Go about all the types and sort available and choose the one that suits you the best.
Get a system with a monitoring contract of no more than one year. Signing a contract is beneficial as it reduces the up-front cost of equipment, however, you can always take into account the cancellation fees if you decide on stepping out of the contract.

Install a sensor for each opening into your house be it a window or a door. Start by counting the number of entrances in your home that need to be secured.

Make sure that your home security system has automatic monitoring enabled and has at least one smoke detector installed into it. This is a plus, as it would save your important belongings even if you are miles away from your place and cannot reach in time. Never go for a company or a product, which does not offer this facility.
Keep all the doors of the main level connected to one single device, which shows indication upon breaching. If your house has several doors and windows, which are not easy to be reached out by wiring, then you can also protect them with an area coverage motion detector.

Use of motion detectors in areas containing multiple windows, which could be accessed easily from the ground level, could be of good use. This can in a way also cut down on the total cost of the system.