Do the Gleim course.
If you cannot renew based on activity or personal aquiantence of an ASI, then do the Gleim refresher on-line. It is cheaper than most of those "weekend" seminars, and you can do it at your own pace, when you want. I used it this past summer to renew my CFI certificate, and I highly recommend it. Print the graduation certificate at home, take it to the nearest FSDO with FAA form 8710, and walk out with a new certificate. Simple.
Regards,
RightBettor
"Looks like I picked the wrong week to quit sniffin' glue!"