All I can really suggest is you expose yourself as much as you can to the given skills needed to master. Also, doing some research about the particular skill can help clear of some reasons as to why things are done "this" way and not "that" way, just might help you remember your steps better.
Also, as the others have said, do not compare, its so not worth the anxiety you create for yourself, I know easier said than done, i'ts almost like a reflex, but everyone has different backgrounds, schedules, ways of studying, ect. Practice being in competition with yourself (honestly, that mindset is what kept me excited about clinical). I think you'll be fine. You got into nursing school right? And you are certainly not alone in any trepidation. Good Luck to you!