The thing you could do to just grow them in a slow but safe way is signature campaigns right now.
Also because of the risings the pay out rats of some sig campaigns is pretty nice and profitable but its depending on which campaign.
Is there a link that lists all the campaigns with their rewards?
yes there is a good link here of all the signature campaigns :
https://bitcointalk.org/index.php?topic=615953.0but it is sometimes late to be updated because the starter (mitchell) is sometimes busy so make sure to check the update time of that topic and the last page.