I have procrastinated for far too long and have been sitting on 3 skills that have stopped me from achieving the coveted "all 99's" goal for too long; Thieving, Hunter & my least favourite Dungeoneering.
Not that far off, mercifully, but like all things that we don't particularly enjoy doing, it can feel like a lifetime doing them
Best of luck to you. I know the procrastinating bug all too well myself. Just keep at it, and if you feel like taking a small break, do so in increments. I'm slacking in certain goals myself, but I'm slowly getting there though.
You're absolutely right about doing it slow and steady. Don't burn yourself out - have fun working up to max! Once you get there, it's definitely worth it
Good luck! It looks like you're already making quick progress, so you might have your max cape before you know it. I'm sure you'll get there - keep it up for the final stretch!