We do not recommend spending training points raising trade skills on non-progression servers. Visit our Tradeskill Guides links for detailed information on raising each tradeskill from 0 to 300 and beyond!
While tradeskills in EQ increase with practice, trade skills cost you money (in supplies), regardless of success or failure. For the more expensive skills, it's wise to stockpile some money and/or ingredients in advance.
When you see mention of a "trivial" on a chart, it means that at that skill level, you will no longer gain skill increases from making the item. You may however still continue to fail quite a bit when making the item. Just because something is trivial does not mean you can do it in your sleep. Eventually, as your skill improves, your chance of failing at making the item will decrease, but there's almost always a chance of failure.
If you fail to make an item, regardless of your skill level, you will receive a message "You lack the skill to fashion these items together" (or something to that effect). ALL this message means is that you failed to make the item (see the mention above about trivials and the fact that things can always fail, regardless of skill). Failure to make an item does NOT indicate whether an item is trivial or not.
If you're getting a failure rate that will rapidly bankrupt you, find something that trivials closer to your current skill to practice on. (i.e., don't try to make a silver sapphire necklace the first time you try jewelcraft).
When a recipe calls for two or more of a single item, DO NOT STACK the items. Have two (or more) single pieces of the item in your forge, brew barrel, etc., not one pile of two. Stacked items count as a single item! If you put a stack of 20 of an item in the tradeskill container during a combine, the container will yell at you and refuse to do the combine.
As you continue to raise your skills, there are additional AAs that can be purchased to help reduce your failure rate and another set that will increase your chances on recovering an item should you still fail. If you're a serious trade skiller, these are a good investment. Check out the link below for more information.
The last thing to mention in terms of basics and getting started are Geerloks, Trade skill items and Trophies. These are items that can raise your effective skill level and help increase your chances of a successful combine. Follow the link to read all about them.