I have tried a few survey websites when I was bored and not doing anything else.
I haven't gotten rich from taking surveys and it wouldn't replace my job or provide me with a full time income needed to pay all the bills but I did earn an extra $500.00 per year through them which at least covers the cost of my property tax.
I mainly take the surveys while in waiting rooms or just sitting at home watching TV just to have something else to do.
There's many good survey websites such as inboxdollars and surveyjunkie and many more but those are the two survey websites I use to earn some extra money.