Well, you can do like me and go to places like fel yew gate and drop assorted foods and such around. I promise you you'll see some "early" results that will break the monotony. Also, don't be afraid to carry some yummies on you and die. I always get a hardy chuckle getting raided at champs cause always 1 dope in their crew eats my "cooked" birds. Hehe.
Now they usually only stay poisoned for a few seconds, but you can watch them spam their greater cure potions and what have you, which creates business for alchemists.. but that's another story altogether. Also, keep in mind i haven't touched poisoning in a long time, but I've been having fun with my mage and tamer characters, and haven't even played UO save for this month in the last 5 or 6 months. but Those are a couple suggestions. Again, other skills are usually more fun because they tend to drag you out of your home if leveled while playing the game, every time I make a character I struggle with finding focus to level their skills, but as I get around places and such talk with people I run across that character tends to develop a little persona or whatever that makes training the skills a little more fun. I try to at least level professions skills in towns to mix it up, and pay attention to general chat in the off chance people ask a "Hmm what is this, or how do I do that" question I try to answer them. Those little interruptions actually help with leveling the more "boring" skills. But yeah, skills in general could use a touch up for training methods. I think poisoning though could be made more appealing as a type of "black profession". Have guildmaster thieves give out bulk order deeds for like missions. Here's an example..
Rufus the aspiring assassin (poisoner) decides to go to town and single click the GuildMaster thief.. In his contextual menu is an option "Job". He clicks it. The Guildmaster thief gives a little "quest" :Today some councilors are meeting in Jhelom to have a discussion about upping security in Britain due to increased protestor unrest.. Among the members of this panel include the Head of the Jhelom Warriors guild and several high ranking Council members.. A feast is to be held, and WE'RE throwing the banquet.. It would help if you could bring me 20 Cooked Birds.. Cooked. hehe."
In Rufus' backpack spawns a "bulk order deed" for 20 deadly poisoned cooked birds. He can go poison up some birds, give it back to the thief guildmaster and viola, random reward. This could be gold, copious amounts of night shade, maybe some type of points that can only be redeemed through the thieves guild.. etc.. I dunno, this seems like it could add reason for others to level it and have something to do other than combat, opening poisoning to whole other cliques of players in the game, and these quests could be introduced to influence story arcs, so only offered at certain points and times, like depending on the amount of points accumulated per server certain story characters could actually be poisoned and killed changing the outcome of those individual servers. I realize this could be a nightmare for dev side and such, but it'd be hella fun, and add more reason for people to buy transfer tokens because maybe they get attatched to say Casca or Queen Dawn or Lord So and So of Randomcity, who may or may not have died on particular servers. Just my 2 nightsha.. I mean cents.