Cool - a 14 year old thread brought back from the dead!
First on the thread topic of tightening loose ferrules, I used to use epoxy glue but switched to Cyanoacrylate adhesive aka "Krazy Glue", "Super Glue" etc. to put them back in place, It only takes a few seconds and you are done. I have never had one come loose that was Super Glued in place. You can also wick super glue into loose ferrules that have not come off the handle yet to keep them from spinning.
If your brush is expensive and the paint or varnish is flaking off the handle, which is common with water based use, give it a coat of alkyd medium or urethane varnish from end to end before you glue it back on to extend the life of the handle. Pay particular attention to the end that will be covered with the ferrule as you won't have access to it once it is glued back on.
As for the position of brushes when soaking, cleaning and storing this link covers most of it. I would add that Masters Brush Cleaner is the best I have found. I also use Murphy's Oil Soap for brushes that end up with dried paint in them. If you don't periodically reshape your brushes as described in the Masters Brush Cleaner instructions or some other method such as with soap or starch, they will eventually end up splayed. I condition and shape mine every other time I clean them and they all look like new, though they mostly are 2-5 years old.