Don't let this bug you / bog you down

(not necessarily "lustig", but would get the point across)

"And all the problems at your door
Don't let them bother you no more
Just take them all down one by one
You'll find they fall apart
If you face them with head and heart
And what was hard doesn't seem so hard no more."

from: http://www.slf.com/lyrics8.htm

oder so ähnlich...!?!