Can I backup my bitcoins or bitcoin wallet?

[Rockford99]

My wallet has 6 different blocks of credits (+ sign) and each one has a long string under the "Description" field.  I left my portable hard drive while traveling last week and got it sent back to me.  Is there a way I can back up my bitcoin info in case I ever lose my portable drive in the future?

Thanks!

[Garrett Burgwardt]

It would be great if we had a wiki or something where questions like this were answered.