IPhone apps crashing & battery draining, why?

My iPhone apps seem to be crashing after a few seconds including Music, email, facebook, sleepcycle and internet. My battery also seems to be draining really quickly all of a sudden. Today, my battery only lasted 4 hours without me using my phone! Has anyone else experienced this and knows of a fix?

SuperSunT, Thanks for posting this... as I'm having the same problem.
Both my partner and I have iPhone 4S bought on the day they came out. We weren't having any problems till last month I noticed my phone had the "lock" icon in the center at the top of the home screen and any apps (this "lock" icon is NOT the rotation lock, it is the one that should normally only show up when the phone is locked). I could not get rid of it, no matter how many times I locked and unlocked my phone. When I went to go to the Settings app/page, it was blank. It was just a light grey background with tiny pinstripes (the usual background of the Settings page). I was also unsuccessful turning the phone off just using the lock/power button.
I finally had to hard-reset the phone as apps started to not work either.
I've only had the "lock" icon problem once, but I've had the Settings App/page blank several times, and each time I've then been unable to shut off the phone with just the lock/power button... then apps start to malfunction.
The other day it did it and I just let it sit locked for about 10 minutes and it resolved.
I have app crashes from time to time, but not anymore than before.
My partner's phone started having the Settings app/page being blank and being unable to shut off the phone wihtout a hard reset the other day as well!
I do not really want to do a clean install, and HATE when the Genius bar suggest this. They don't ever suggest this for their Mac products, yet they're so nonchalant with this on the phone. I know they're two VERY different products, but this is getting to be their "I don't know what's wrong. Instead of me replacing your phone, you must drive back your hour drive, do this arbitrary thing which may or may not fix the problem, and when it doesn't, bring it back in so we can replace the phone and have it do the same thing again until an update comes out!"
Sorry, can you tell I've had a few too many problems where this is the case!
Anyway... I'm really curious about a few things. I've not done a clean install since getting iOS 5 (even when I got the 4S I restored it from a 4 backup... but my partner just built his from scratch). So, I know Game Center will take care of my games. My e-mails are all stored on the server. My notes are backed up to the Cloud. I do have general Cloud backups turned off. I know I'll need to transfer pictures. But what other types of stuff do you suggest I should backup? Basically, I'm asking what are the things you wished you had backed up that you forgot?
And what is this "some apps let you send backups by email" that you speak of? I've not seen that, but I've also not gone looking for it? It drives me nuts that some apps have settings within the app, and some have them in the Settings app/page... and even worse, some have both!
Sorry this post is so long, but I've been searching for other people having these problems for a month now... starting with the "lock" icon problem (I figured that was the one identifying thing). Unfortunately, I just ended up with hundreds of people who couldn't figure out that they had turned on the rotation lock and couldn't turn it back off.
Thanks for your (or anyone else's) help in advance!
P.S. I'm including pictures of the "lock" problem as well as the blank Settings page!
This first one shows the "lock" icon at the top. Clearly I am on the "Home" screen and the phone is not locked.
This second one is while I'm in the Settings app. This was taken the same day, and I just noticed that not only is the "lock" icon not showing, neither is the clock. I have another screen shot from a different day where I wasn't getting the "lock" icon problem, but the clock was in the middle at the top as it should be.

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