It depends. I guess it depends most on what kind of state the apartment was in when you got it and how well you documented that state. For example, if the drip pans on the stove weren't clean, then that's one less rather difficult task you have to do.
However, if the apartment was spotless when you got it, here's some advice.
Painting may be against your lease. Depending on how handy you are, you might want to spackle any holes you made and leave it at that. Minor scuff marks on the walls from furniture rubbing are normal wear and tear. Holes and dents/dings in the walls are damage.
Have you ever cleaned a carpet before? It's not as easy as it looks. You might want to consider hiring a cleaning company for that. Stanley Steamer et. al generally charge about $100 for a good-size one bedroom with wall-to-wall except in bath and kitchen. A rug doctor with cleaning fluid will run you $40 or so. Don't kid yourself that one of those Hoover or Bissel personal-jobs will get the carpet to "move-in ready" condition. They're good for everyday messes, but don't really get the carpet all *that* clean. Every LL I've had except for 1 charged more than a what a cleaning service will charge you. I used to say that Stanley Steamer had a "landlord's special" where they charge twice as much...
The real beast is the general cleaning. You have to move appliances and clean behind/underneath them, get down on your hands and knees and scrub the floor, polish all the sink/bath fixtures, and wash the inside of all the windows. Oh, and don't forget the mini-blinds...those things are a PAIN to clean. It's time-consuming, but it can be done without a professional. For this type of deep-clean, a maid service will run about $200-$300 or maybe more, depending on the size of your apartment, how dirty it actually is, and where you live.
There are some rather inexpensive ways to save yourself some dough out of your deposit:
*Make sure all permanent light fixtures have working light bulbs in them.
*Replace the drip pans on the stove, they cost $4-$8 @ Walmart, a LL will charge you 3-5 times that amount.
*Make sure all cabinet door hinges, towel racks, cabinet hardware, and door hinges are tight. This costs you nothing more than a few minutes and a screwdriver.
*Replace the screen on your over-the-stove exhaust fan. They're only a few bucks at a place like Walmart or a hardware.
*Most importantly, if anything is in need of repair and you didn't tell your LL because it was minor and more of a hassle than it was worth...REPORT IT! Don't let her discover the kitchen drain drips AFTER you leave, or she might decide to blame you.