If you're uploading then LW will perform much better, that's important to understand. So sharing a variety of material can help to connect directly/indirectly via different sources. Some people rotate their shared material which seems to have the effect of obtaining different search results. Personally I share a variety of material at the one time. Last year when I added a new type of material to share I found I got a different breed of uploaders & many files I'd been having difficulty obtaining suddenly became much easier to get. If you search the forum you can find more hints.