Just Farm. Pick a herb, I currently do Kwuarm as I make decent money from selling the super str pots too. You should of course, pick a potion you CAN do until then. I recommend Irits at the moment until you can make super str. Pick another skill or something you can do where you can easily leave and get back to it. Once you've done this skill for an hour and a half to 2 hours, go harvest all 5 herb patches and dont bother with anything else. (Herbs take 75 minutes to grow.) This can be done VERY quickly like this: Skills Necklace to fishing guild for ardy patch, Teleport to Cammy for Catherby Patch (or run from ardy patch), ectophial for Canifis patch, teleport trollheim for trollheim patch. Bank at Cw if needed. Explorers Ring to Falador Patch. The Herbs will stack up and up and before you know it, you'll have enough. Also, do a herb run before going to sleep if possible and then reset yourself at the first patch for when you next log on. If you're not going to be playing RS in a day but aren't busy otherwise, leave yourself at the herb patches and quickly run through them every Hour and a half to 2 hours. It's profitable and painless, and provides breaks from other skills. I highly recommend it. I was level 63 when I started this and now am 68, made money, and more importantly, had fun farming and herbloring for the first time since I can last remember.