Buy Some Tools
If you feel like you're going to do some serious cupcake baking, it might be a good idea to get some specialized tools. Professional cupcake makers use piping bags to apply frostings and even some fillings. I would strongly recomend getting more then one, because you may have mess-ups and you may want to use the bag for more then purpose per cupcake.
Feel Free To Freeze Cupcakes
Frozen cupcakes are eaiser to frost. Plus, you can freeze un-frosted cupcakes for as long as two months.