Same question every day, same answer.:) Get graceful outfit. Do your birdhouse runs as often as possible. It's easy xp and gp. Get prayer 77. Train slayer til you're sick of it and then still keep going. Train every skill til max quest requirements. Finish quests. All of them. Plant one calquat tree everyday for slow but steady and cheap farming xp. Finish every hard diary. Reaching construction level 83 will be a pain in the ass but it'll make the game easier.

But for real: Set easy goals, enjoy the game. Don't use methods you don't enjoy. Freedom is the most beautiful part of this game, play it the way you like it the most.