guild point items cycle through skill ranks starting from recruite up to your current rank. Once you pass the test and become apprentice, talk to the NPC in apron around the guild to sign up for guild points. And that's the NPC you have to turn your daily guild items to. The items the guild will ask you to turn in each day will be recruit >initiate > novice > apprentice > back to recruit in this order.
I think it's still ok to train skill while you collect your points. There are certain item choices the guild can ask you for each rank. While higher rank items can sometimes be very expensive, it can random to the cheap ones too. And higher rank items also gives you more points per day. For example recruit items may be able to give you 1200 max per day, while craftsman items may be able to give you up to 6000. Getting your ranks up isn't all that bad for this amount of points IMO. And ofcourse you can always skip if it asks for unreasonable expensive items.
The items you should be focusing first are the +skills. It's almost same for every craft, the first item you can get is when you reach journeyman rank (48+.) Weaver guild has the cute glasses for you at this rank for 70,000 points. Then again the apron at 78+ skill for 100,000 points. And finally, the furniture at 88+ skill for 150,000 points.
The spinning key items can save you some crystals when making threads. Instead of 1 crystal for 1 thread, you're bundling them together and use 1 crystals for 3-6 threads instead. It's up to you really, if you make a lot of thread for money, this will safe you a little extra gil.
Cloth Ensorcellment and Cloth Purification enable you to make certain items. I don't know how useful these are really.
Double Post Edited:
oh, and check this site out. It's a very valuable tool for anyone doing guild points
http://www.titanictus.com/tools/guild/
I have heard it can contain errors. I have yet to run into one myself tho.