There are a lot of good ones - I recommend looking in "Program Threads" for descriptions and what people think of them. Personally, I collect Zubees, so I start with the 3 exchanges which do the "Surf Party" in Zubee Zone each day to build up my bonus %. I add in exchanges associated with Power Surf Central and TE Command Post. Over time, I have built up a solid list of exchanges I prefer, but I recommend that you start with these basics and learn which ones work best for you.