11. The monthly upload limit for free accounts is a fairly generous 100MB. Even so, you may want to consider resizing your photos before you begin so viewers don't have to wait an age for images to load. You can automate the resizing process in many photo editors, or you can use jUploadr.
12. You may prefer to edit your photo collection online using the Picnik batch editor that's incorporated into the site. Scroll down the Flickr home page and choose ‘Edit Your Photos' or click the Edit Photo option above your snap. Note, however, that you can only keep both copies of an image with a paid-for Pro account.
13. It's possible to have photos from several contributors housed in a central place using Flickr Groups. You can set a public group, a private group that only you and the other group members can see or a public group that operates on an invitation-only basis. Select Explore to search for groups.
14. To set up your own, click the Group tab on the Flickr home page and choose ‘Create your own group'. Decide on a type. You can't make a private group public later on, but you can hide a public one. If your group's photos contain adult content, tick the relevant box so that under-18s can't view it.