Runescape tips - Returning To Runescape

Ive decided since coming back to runescape to try and make it challenging by just playing as a f2p user never becoming a member, theres a number of people out there that have done this and have become rather good at becoming pure f2p so id like your guys advice what to do and what not to do, as i havent played in awhile.

also how to make really good cash in f2p. which skills are worth training. what methods to use that type of thing