if you want to do a pro job for chronologies, you can use a proprietary software product (like casemap; no financial ties to disclose) that will help you organize. all you have to do is enter the content of a particular record (cm will even allow you to attach a pdf of the original) with date and other criteria you specify, and then the software sorts it all by date, or by provider, or by keyword, or whatever. for me, the big drawback of the casemap family of products (and they are fabulous) is that they refuse to make a mac-compatible version and i don't want to buy a pc just for my record reviews and chrons, so i use a db i made in filemakerpro. not as flashy but it gets the job done for me quite well.
if you are getting records from an atty, they probably come sorted by provider. hospital records come as the hash they got from the hospital. insurance company records come as hash, leftover, duplicated, more leftovers tossed in, and re-hashed. if i am not sorting records for use by another person (like an atty-- that's what they have paralegals for, or for an atty to send out to an expert with my summary) i like to sort everything i get by date including all providers, labs, procedure notes, diagnostics, the works, all interleaved so i can read from beginning to end and see what happened, who knew what when...and what's missing.
you can get chart dividers like they have in paper hospital charts and use those, too, if that helps.