I once had a CACI facial which is a short-term non-surgical facelift. Lasts about 8-12 weeks but is really relaxing and perks your face up a treat!
Oxygen facials are very in at the moment. Never tried one though and I'm not sure if they're more detoxifying than firming.
I would recommend investing in a couple of beauty products though. For daily use opt for a rejuvinating anti-aging moisturiser, and invest in an anti-aging face serum (use daily on face and neck).
Clarins' Beauty Flash Balm is also great to keep in your handbag. Use 2 or 3 times a week.