Conclusion

1. Do not use WEP encryption, as we seen how easy it is to crack it regardless of the complexity of the password and even if there is nobody connected to the network. 

2. Use WPA2 with a complex password, make sure the password contains small letters, capital letters, symbols and numbers and; 

3. Ensure that the WPS feature is disabled as it can be used to crack your complex WPA2 key by brute-forcing the easy WPS pin.