Hammock, if you dont have one already. This is my first forest but I use my hammock almost every day if the weather permits it. Eno's are great but I have a generic brand and it works just as good. I had to replace the carabiners on it (people still replace the ones from enos from what I gather) but otherwise it works great:
Hammock I bought $22
Straps $20 I bought different ones but they dont sell them anymore, same thing though