I can second this, I started putting just €100/month away and was pleasantly surprised to see it tick over into the €1000 mark very quickly. It's a standing-order at my bank, triggered when any large deposit is made (e.g it fires when my salary is paid).
Now that I reached a milestone (even if I did kill the account from 300->0, 250->0 a couple of times in emergencies) I intend to increase how much I put in there. 10% of my salary is a lot to do without, my wife doesn't work, we have two kids and a mortgage and a (useless expensive) car. But the €100 I simply didn't miss, and the €200, that will get me to the next milestone, when I'll jump to €300, and so on and so on will all soon arrive.
Now that I reached a milestone (even if I did kill the account from 300->0, 250->0 a couple of times in emergencies) I intend to increase how much I put in there. 10% of my salary is a lot to do without, my wife doesn't work, we have two kids and a mortgage and a (useless expensive) car. But the €100 I simply didn't miss, and the €200, that will get me to the next milestone, when I'll jump to €300, and so on and so on will all soon arrive.