it's like you've got the hardest bit done mate! it's plain sailing once you've got a load of sounds and grooves that work together! (IMHO!)
have you tried working with a mate to get a different perspective?
personally i don't find this sorta thing a prob, i just crack on with it till it's done, so i find it hard to give many constructive tips
wot arrangement method do you use? i find it best to get 8 bar loops together, then mute them all out, and copy them 32 or more times - then i'll unmute parts till i find the best combinations and progressions :cheese: