These are the online sites that I usually visit for a good deal.

http://www.metrodeal.com/

http://www.cashcashpinoy.com/

https://dealgrocer.com/

http://www.ensogo.com.ph/

http://www.lazada.com.ph/

http://olx.ph/


For vouchers on trip and other services, Metrodeal and Ensogo are the best site to go, but for shopping for items with deliveries, it is wise to choose Lazada and Cashcash Pinoy, because they have fast delivery service usually 2 to 7 days and you can pay COD (Cash on Delivery). But if you're in the look for expensive treat like staycation at Manila Hotel, then Deal Grocer is the site to go. For anything else, you have OLX.PH (sulit.com)