You'll have a total of 2,160 points (worth £15) in your account so you can visit the 'rewards store' to choose which gift card you want, which you should do before the sale ends on Wed 24 Oct. The gift card will then arrive within 10 working days, either by post or via email in the case of voucher codes. You can also convert your earnings into PayPal cash but it costs more points (800 SB = £5 PayPal).
Retain some control. If you upload photos of yourself, or friends/family with consent, it's worth going for the 'rights managed' licence option – otherwise you'll have little to no control over how your images are used (eg, you could star in an ad for haemorrhoid cream). See Alamy's page on understanding stock image licensing for more on the different types of licences.
Take good pictures. Some of the options below don’t require you to actually take the picture and sell the product, but for the ones that do, make sure you take a clear picture that makes your product stand out from the others. If you’re going to be taking a lot of pictures, set up a small “studio-like” area in your home with a backdrop and proper lighting to really make your pictures come across as professional. And of course, you’ll want a good camera too.