Being safe online is very improtant.
Having strong passwords will not allow people to hack your acounts, having numbers in your pasaswords will make it stronger.
If you dont have a password on your wireless connection then other people will be able to get on it and will be able to change all your settings.
Check your virus protections now and then, to make sure everything is working well and to see you any virus have came onto your laptop/computer.
Social networking: twitter, facebook, ebeo