I have an upload speed between 90-100 KB/s. I allow 4 upload slots & 2 per person. 4 upload slots to give them a decent speed. 2 per person so one person does not steal all slots for themselves (I used to have it set to 3.) Reason I do this is because I share a large number & also a wide variety of files including different media types. Different people on the forums will give you slightly different advice. Problem with this technique is if someone selects 'too' many of my files to download at once LW will show them as being a 'Greedy Client' and ban them just for that session. lol I see that message now & again (someone who is trying to download 100's or a couple thousand files from me all at one time.) If I didn't share so many files & so many tastes of files then I'd allow more slots per person. So my technique is not perfect, but allows reasonable upload speeds, and 2-4 people to download from me at any time.

A few things to consider while configuring Limewire for optimal performance... - Gnutella Forums was originally posted a few years ago but been added to by various members. Take a browse if you like & see their various approaches.