I am 47 and have had quite a bit of stuff done. I had CO2 laser resurfacing in February 2009. Super painful, but results were amazing. I use botox around and between my eyes for crows feet. I just started using it in January of 2010 and I absolutely love it!!!! There are many types of fillers and what is best for you will depend on where you need it and what your doctor/dermatologist recommends. My main man uses Radiesse for my nasolabial folds. Here is a quick and dirty rundown:
Hyaluronic Acid Fillers: These add volume and hydration. Good for surface wrinkles and concave scars. Common HA's are Juvederm, Restylane, and Perlane. All last about a year. Juvederm is also good for the lips. Results are immediate.
Customized Collagen: These also fadd volume, but also stimulate your own collagen. Usually used for deeper lines and to add volume to mid-face. Common products are Radiesse (what I use) and Sculptra Aesthetic. Not a good choice for around eyes or lips as the microspheres can sometimes be felt or even see as small bumps. Can last a year to 15 months. Results are immediate. Sculptra is the same as Radiesse, but with a significant difference in how it works. This is a gradual process that requires multiple treatments. Usually 3-5 procedures over 3-5 months. You may need a local anestheti for pain. This filer can last up to 2 years or longer. Even up to 5 years. The results are gradual. Not good for eyes. This is a great way to go if you can afford it and can wait longer for results. Sculptra can be combined with a faster acting filler, but that would be really pricy!
Expect some brusing if you bruise easily. Arnica Gel is fantastic to use for a week before and after. It can keep the brusing to a minimum.
As mentoned above get references, and do your research. This is an art form and should be performed by someone who has lots of practice and is certified. Not sure where you are exactly in California, but I have names in Napa, Beverly Hills, San Francisco, and Coronado.
Good luck and remember. Once you start getting fillers, it is hard to stop!