Hiya, constantly in games, black trades down to a simplified pawn structure (usually in my favor) that makes it hard for me to figure out how to continue.

Now I don't think this position is all that bad, especially considering my rooks.  The game ended up in my win after he blundered into a position where I checked his king into a fork.  I can generate an attack if those pawns are advanced, but I simply don't know how to do that unless they are already somewhat close together.  Could someone give me some ideas on how I should have continued, prehaps suggest a book that would give me these ideas, or show me games where a position relieved of all tension is converted into a win?

To me, it seems that whites d4 square is kinda soft. Black can generate some pressure against the white queenside pawns via nb4. I don't really see that either side has a decisive advantage. I'm thinking maybe black should push his kingside pawns a bit, putting some pressure on the white bish, and also give his king a route to solidify the centre. Without worry of backrank mate, Black can mobilize his rooks before they get tied down to defence.

I would play 1 Nd5.  White looks to have a reasonable advantage there, I would say.  Since a position with symmetrical pawns doesn't have any pawn breaks, your best bet is just to keep on improving the position of your pieces and hope that eventually you can infiltrate somewhere (like the 7th rank) and win a pawn or two--without of course giving him too much counterplay in return.

hey i just did ilikeforests nimzowitch my system article and in one of of them he says that that pawn structure you have is ideal for black, check it out just kind of interesting but still i agree you rooks are beautiful. the reason is because it is hard for white to get counterplay it tends to equalize i guess i don't know maybe something for you to look up cause you have more knowledge. and so you could be on the look out for that pawn structure developing knowing it stales the game. 

1 Nd5 Nd4 2 Ne7+ Kh8 3 Nxc8 Nxe2+ 4 Rxe2 Rxc8 5 Re7.