When I was out of work and then under-employed, the most wonderful thing friends did for me was to simply give encouragement. Telling your friend things like "This is only temporary -- you'll find a good job before long" and "You have a lot of skills and I know an employer will really value what you have to offer" will bolster her spirits like nothing else can. Sometimes, when you're in the middle of problems, you can't see there's a light at the end of your dark tunnel, but a friend's encouragement will give you hope.
Inviting your pal to a dinner or movie, play or other entertrainment event is also a "stealth" way to help -- you can claim you won two tickets to the event at work, or were given a gift certificate or two for one coupon, would your friend like to accompany you? If she had to disconnect her cable, bring her to your home for an evening of good TV shows or movies on TV. If you're going to the beach, lake or mountains some weekend, invite her to get away -- sometimes it's a help to get out of the house when you're down. You can also invite her to church if she has no church home, especially if you go to a casual service where dressing up is not required. If your garden produces a bumper crop of some vegetable or fruit, it's not too obvious if you give her a basket full of that food. Could you have a girl's night in, and do a beauty makeover? If she's your size, what about a clothing swap? You could exchange garments you're tired of, and what you both get in return will be like brand "new" to you. That may be especially helpful if you have any job interview clothes she could wear.
When my grandmother was living on a fixed income, I found that practical help was the most needed kind. Sometimes I would give her a roll of stamps to pay bills with, or warm clothing. My mom always drove her to the grocery store and let her use the family washing machine and dryer. Once, Grandma had lost a lot of weight and then had problems with her decades-old dentures -- so my mom and I gave her a trip to the dentist for Christmas. That sounds weird, but Medicare didn't cover dental visits; Grandma later told us that she could eat her food without pain after having her dentures adjusted to fit her mouth. We paid the dentist, and Grandma said our "gift" was something she enjoyed every time she ate.