And ask this way:

tell me 3 things that you need this week.

If you say "how can I help?" it is too easy to be brushed off or too hard for someone to be specific at the time.

And find out what her schedule is daily, as there will be clues there about errands, etc.

Maybe she needs someone to pick up scripts/groceries etc or help with transport to dr appts or grocery shopping or home chores
and does not know how to find those services.
Maybe a pet is too much right now?

( Mr. Dixie is having mobility problems and I have a long list of things I need help with , which is what prompted my comments)

You can find links to resources, including transportation, here:

http://www.cancer.org/treatment/supportprogramsservices/index

This website has a lot of helpful information re disability and insurance but I have been unable to reach anyone by phone:

http://www.patientadvocate.org/

I set up an Amazon wish list so that people could help me with items I need while going through chemo. A few things I find helpful:
Soft tooth brushes
Biotene mouth wash
Warm socks
Unscented moisturizer
Silk pillowcases
Protein bars
Hand sanitizer

Here they are:

http://www.cancer.org/treatment/supportprogramsservices/index

http://www.patientadvocate.org/