BittBox's Jay Hilgert shares his professional advice on keeping track of your digital assets.

• Sort via filenames If you insist on keeping everything in a single folder, a quick way to get organised is to add a prefix to the filenames. You can use something like vector_, img_, icon_ and so on. Sorting by file type alone won't always work since many downloads are folders, not files.
• Take note of Flickr licences If you're like me, you download from Flickr on a regular basis. I like to save my Flickr images in folders named after the different Creative Commons licences. This way I automatically know how each image can be used.
• Save EPS thumbnails When you are looking at an EPS file you downloaded, re-save over the original and make sure 'Include Document Thumbnails' is checked. This means you get a thumbnail while browsing your file system instead of an EPS icon.
• Create folders for stock sites Keep a folder for each of your most frequently used stock sites, like iStockphoto. Have you ever used a comp image in a mock-up and forgotten where the image came from when it was time for you to buy it?
• Sort rasters from vectors Separate your images from vectors inside your stock site folders. Vectors can be extremely large, intricate files, and it typically takes quite a bit longer to preview them than image files. If you browse using your keyboard, previewing vectors when you don't need to will just slow you down.
• Delete your Zip archives If you're using a backup disk, you already have a copy of your asset library anyway, so get rid of those Zip files that are just sitting around taking up precious space on your hard drive.
• Know your rights Read the licences that accompany your downloads - they're often contained in a 'Read Me' document. You can't use a file however you want just because it was free for you to download.
• Keep track of source websites When downloading icons and icon sets, I like to rename the file or folder after the website I got the files from. This can come in handy if you need to get permission from the author of the icons at a later date.
• Save Illustrator files safely When making your own vector stock artwork in Illustrator, make sure you select 'Create PDF Compatible File' when saving. If you leave this unchecked, you'll run into problems when you open the file with Photoshop because of rasterising.
• Don't rip people off Read the licences for resources you get from discs, like the discs that accompany Computer Arts. Content is provided by artists like you and me, bloggers, deviantART gurus, and so on. If you have any doubts about a licence, always email the author and ask.