Is there something that you need to accomplish, something that has been nagging you that you need to get done? Than do it. Right now.
There will always be an excuse, the timing will never be perfect, and there will always be a million other things you could do instead.
But if it is really important to you, you might never get a second chance. You won't regret trying it or going or doing, but you will regret it if you don't.