How to make details less blurry/pixelated? simple, go up in the resolution of your W.I.P. skin, that way, it won't show pixelated when you try it out. and when you're all happy with the skin, then you reduce it to original size and apply the sharpen filter. but you should always keep your W.I.P skin, in case you want to change something.
now.... i sure can't give you some tips, based on the picture, as i miss the actual skin to look at. provide me that and i'd be glad to help :]
You can use pastebin to get me a skin you're workin' on, so i won't have my profile spammed with pictures.
one tip i can give :3 Simplicity is always better option than a bunch of little details, as they get lost in the game.