Been reading all the posts on post ICS update issues. Only had update a day, but no issues yet. But after reading a lot of the posts, it sounds like doing a factory data reset after the update is recommended. Just wanted to get a consensus before I do this.
You can do a factory data reset anytime. If things are running well and you have no data issues, there is no reason to rush an FDR. If you start noticing problems, well, then you can FDR.
In the meantime, follow what wildkitten said to make sure that your data is backed up and easily restored in case you need to do so. In addition to what she mentioned, if call logs and SMS/MMS backups are important to you (a factory data reset will wipe these), then I recommend an app called SMS Backup+, which will back up your text message store to a label in your GMail account, will continue to do so after you send and receive them, and can also do the same for call logs (in addition to putting all calls into a Google Calendar for you.) It's a great, free app.
https://play.google.com/store/apps/...1bGwsMSwxLDMsImNvbS56ZWdvZ2dsZXMuc21zc3luYyJd
(ICS themed version: https://play.google.com/store/apps/...sMSwxLDYsImNvbS5jb2RlZGluY29sb3Iuc21zc3luYyJd )