SmartyPig makes it easy to setup automatic monthly recurring transfers from your existing checking or savings account into your goal on the day of the month you specify. If you wish to add additional funds into you goal, you can do this at anytime. Log into your account, click on the "manage" link and then click on "add money" next to the goal you wish to transfer funds to.

(switch to full screen mode - click the icon in the bottom right of the video)