The solution is simply bots! They will do like you do while leveling, but you don't have to do anything! Just configure the bot to do what activity you want and it does it! WARNING: Runescape DO NOT want peoples to use bots, and may ban the account, but with the correct bots, the risks are minimal and you can always do this on an alt, but still, I am not ressponsible for any temporary or permenent ban that may cause you.
But now, you're probably wondering which bot you should use. Well I know the BEST bot on the internet, which is EpicBot ( I do not own the website/product ). It have alot of different options, some are free, some are 'pro' beta and some need to be bought, but the free options are well enough and already beat most of the bots out there.
How to install:
1. Go to http://www.epicbot.com/
2. Download EpicBot
3. While downloading, register an account
4. Install EpicBot
5. Run EpicBot
6.Wait for it to update and stuff
7. On the upper tool bar, click on the key and login with your EpicBot account
8. You may want to set the name and pass of your RuneScape account too, in the tool bar, so that if it got to log off, it will automaticly log in
9. Log in with your RuneScape account
8. Choose a skill to level, and choose a location to train
9. Click the little green arrow, and choose the bot you want for the skill you want to level
10. Configure the bot with the options you want ( Exemple: For WoodCutting, which kind of log, where, drop the logs or bank them, and more. )
11. Sit back and let it run! You can let it run all night if you want ( It may log off and never log in again in certain tasks like training Combat, but never in skills like WoodCutting )
12. Like, Comment, and tell your friends to read this! ( It really helps me :D )
Remember to use this with moderation, if all players would do this, RuneScape wouldn't be fun anymore!