Tell a friend where you are going and when you expect to be home.
Follow-up by checking in with your friend at a predetermined time and/or when you return home.
A clever crook or stalker can put together your identity from casual hints you let drop.
Maybe you've joined dating sites and after dating a few people who didn't work out, you've just had enough.
Take your time getting comfortable talking online.--Don't use a sexy name.