One of the best things about RuneScape is that it's a sandbox-style game. You can do almost anything that you can think of. However, that's also one of the problems with RuneScape; there's so much to do, and sometimes it's hard to decide what you should be doing. Here's a few suggestions for things to do on those days when you feel like you're stuck in a rut:
Play a mini-game: There are dozens of mini-games. When was the last time you played one of them? Pick one that you don't play often, join the world with that game as the theme, and enjoy a change of pace. You may make some new friends along the way too.
Try some new quests: It's easy to get caught up in the skill grind, but RuneScape has some amazing quests. Unlike other games, where quests are just a way to earn experience, RuneScapes quests are well written, and have a lot of lore (and humor) in them. Even if you're not normally a fan of quests, give them a try. You'll be surprised how interesting they...