I use FreeAirmiles.com and Milespree.com on a daily bases. I check Trocomania.com and Milesource.com a few times a week. Once or twice a week I check payyobillz for more ways to earn Mypoints and finally I check out Greenpoints as well.

The only problem I can see is when I will cash in all those miles..I will have to use some friends over there