Since I don't know where I will appear, I definitely need these things to get around.
Compass, Telescope and Sextant
Dictionary with translations for European languages
Clothes that are appropriate for that time period
Matches and Lighters
Gold and Silver
Revolvers and lots of ammo
Axe, Flint, and other basic survivor tools
Medical Knowledge
Bullet Proof Vest
Anything extra would include how to kind of books since I can't carry everything.
Looking like a complete stranger, it's probably best to blend in as much as possible or you will be taken to some kind of court and found guilty of something. Even with all that firepower, there is only one of you and they had their own kind of offensive weapons too. I'd probably make my way to Rome. You also have access to the sea so if you wanted to go somewhere else you could with enough money. The church had a large influence so if you wanted to do something on a large scale, you would most likely need their help and approval. As long as I say these ideas and inventions came from God, that may put me in the clear for having such items. First thing that jumps to my mind is make the crusades successful, this could undo a lot of bullshit in the Middle East besides being fun. The revolver is a reliable firearm and the knowledge of gun powder would at least let others build simpler guns and other weapons. No one would stand a chance against an army like that. This would be enough to keep the mongols from invading our turf later. The next big thing I would do is share navigational knowledge in the promise of the gold and resources that it produces. Imagine if Europe reaches the New World even earlier? Lastly, reintroduce the wonders of plumbing and personal hygiene since I want to live past my thirties. The rest I can think of once I get there.
If snacking is high on the to do list, bring some rubbers.