I have several m+ apps, in addition to the m+places one. Each one earns at least 4 points a day, and an extra 10-25 a week. I have an iphone, and apparently android phones have more apps that earn points than the apples based ones. There is one game, Parsecs, that I am terrible at, but it still earns points as well.
http://www.thepennyhoarder.com/how-to-make-money-on-your-phone-mplus-rewards/
I am not sure, but I think you can visit these sites more than once a day, and accumulate points each time. The ones I use are Cheerleader, Facts, I am, Motivation, Palabras, Thankful, Vocabulary, Women, Daily Love and LMAO. It helps that most of these apps are motivational or educational. When you open each of these, there is a circle with 3 dots on the bottom that you click on. That takes you to a page that lists other sites, and has a circle with the letter m near the top. Clicking on that takes you to the page where you can get points. Sometimes clicking on one of the "achievements" takes you to an ad that lets you earn 10-20 extra points.
On m+places, I try to stop in my local Krogers parking lot once a day, and load up on points. It helps that I am in a suburban area, that I have several traffic lights on the way to work, and that there is a place near my office that gives points. Every time you click on a place, it sends out boxes with offers and points, and you can retrieve them in 24 hours, if no one else does. THere are also boxes on the map, and you can click one an hour.
During the week, I average about 1000 points a day; weekends are harder, since we want to spend time focusing on our son. This works out to about $10 in gift cards a month, which isn't bad for just keeping busy while at stop lights, in the grocery and in meetings.