If your stake button is green and your weight is slowly increasing just be patient and you will begin staking. For me the first few stakes were larger but fewer mines, now that I have moved coins around I have small stakes but every couple hours or so.
PoS is awesome...free Supercoins!
It's fun to watch the PoS coins drop into the cup all day, but if you want to minimize how many transactions you get per day (I used to get LOTS), then send all of your coins to yourself and you'll get larger PoS payments with fewer PoS transactions...I used to get a few coins here and a few coins there, but now I get hundreds at a time instead...it's fuckin' awesome lol
Buy, hold, and stake right now, because in the very near future you'll be happy you staked a bunch of free Supers
It's 100% PoS the first year, so it's totally worth it to just hold and stake for the first year; sell half of your Supercoins after the first year and you're laughing
And 50% PoS the second year on your balance is pretty fuckin' cool too