Just a reminder that the best way to ensure you will get the most surveys possible is to keep your profiles updated. Just cause you did them when you first signed up doesn't mean that have stayed updated. Each time you have a life change (job, house, car, kids, career, etc.) go through your survey sites and make the updates. It really does help the surveys come in more regularly (and also reminds the sites you are out there!)

nice tips

I think another tip is even just going to the website to log in. I know a lot of survey sites say you never have to go to the website because all the survey invites go directly to your email, but just logging into the site to check your balance let's them know you're still alive.