I don't agree with the general consensus on webdip about Italy being a follower. You have the most easily defended combined diplomatic + tactical starting position in the game and your primary cause of death is not getting enough centers to survive the middle game. That to me screams "Get aggressive!" It doesn't matter how bad you piss someone off on the board, it is hella hard to get knocked out right away as Italy unless your neighbors just outright aren't playing to win. Take advantage of your position, get out there and lead. What people are looking for in 1901 isn't another vulture waiting to swoop in on whatever conflict arises; that's what everyone does and it's sooooo lame. It does nothing to distinguish you as a useful ally, which is terrible for Italy, because you need an ally to get past your 4th center and to survive the middle game. No, what people want in 1901 is somebody unafraid to put their cards down and say "I'm doing this, here are the concrete steps I'm taking to accomplish this, get on board with me and let's go places." That's how you get things done in real life and that's how you get things done in Diplomacy.
Unsurprisingly, I tend to prefer getting after Austria early. I'm perpetually surprised at how easy it is to negotiate an open Trieste in S01; take it and you're guaranteed to get to 5 centers in 1901. Get Russia on board with bringing down Austria and you're mostly there, then it's just a matter of staying in contact with Russia and winning him over as your primary ally. Pummel Turkey next, then go west for Marseilles and Iberia, then stab Russia for 18, maybe with a diversionary swipe at Munich to get over the hump. Fairly straightforward, not easy but as far as solos go, it's a pretty good path to one.
If Russia's a pansy and won't play ball, then Turkey is an incredibly underrated partner - sure, conflict is inevitable, but conflict is inevitable with Russia too, or Austria. The Italy/Turkey hype is just because most people flame out as Italy and never get past their 4th center, typically because they failed a Lepanto, while Turkey grabbed Trieste, Serbia and Greece to get to seven and then knocked Italy out to get to 11. But whose fault is that? Italy, for not playing well in the first place and making himself the more tempting target. You get Italy to 6 or even 7 centers by fighting Austria, and I guarantee you Turkey will be open to putting off attacking you until he gets a shot at Warsaw and Moscow.
Western moves can work too, but I find they take too long and that you either have to leave a 2-unit garrison over there to keep the centers (in which case, what have you gained? you're at seven centers, but only have five to use in the Mediterranean theater) or you promptly lose them to England (less often Germany). If Germany told me he had negotiated a DMZ in Burgundy, that he planned to break it and that he would support me to Marseilles in A01, I'd go west for sure. Short of that really generous package, I'm not sure it's worth the time. France takes forever to crack from the south with four units.
So the keys here are to be specific, aggressive and open in your early negotiations, and to pick a target quickly and get moving on them. Italy does not benefit from a wait-and-see game. It's built to be used aggressively and becomes wildly successful when used aggressively and competently.