Saying thanks is no biggy for me. I like to let people know when they've done something nice for me, and I like to let people know I appreciate it.
Saying sorry has become easier for me over time, I try to be more honest with myself and admitting to doing the wrong thing is definitely a part of being honet with yourself. If I know I'm in the wrong, I'll say sorry freely, however if I'm not wrong, or if I don't think I'm wrong, I refuse to apologize jsut for the sake of keeping the peace...