I haven't tried SurveysontheGo. I am hesitant with all survey sites because I have about a 99% failure rate at qualifying for surveys. How is this working for you? I would try it if it was something more like Tellwut used to be where you answer polls and don't have to worry about qualifying or not. Though, if it's like Tellwut is now where it's going to take a year to make cashout, forget it.
I use all the Swagbucks apps and am very happy with them. I have had really good success making about 66 swagbucks per day off them, or 66 cents faithfully rolling in for almost zero effort or time on my part. Totally worth it to me. I'm using an old ipod I no longer use for listening to music since I now have an iphone, so I am not worried about ruining my device by running all these videos.
Other than that, I do use Perk, but it's a snail. I also do mPoints, which is very successful, I get about $1 a day towards gift cards from it.