Well for most parts, I find good ICOs here in this forum through the bounty threads. There are so many offerings here that you won't actually need to source outside of this forum. The only aspect you should be settling is the requirements of the ICOs or campaigns you would be joining. If you feel that the tasks your should do is just right and not too troublesome, then by all means choose it and join. However, make sure that you research on it and get ample information about its background to make sure that it is legit and has higher chances of profiting.