For avoiding sexual abuse in the context of romantic partnerships, here's the starting advice that I have (and hopefully everyone else here can help me improve upon)

1) I recommend setting clear boundaries on just about everything. It's up to you to decide where to set the boundaries, and you're free to change them over time. I recommend thinking over any changes to your boundaries for a minimum of a full day and a night. It's acceptable to make your boundaries looser or more stringent depending on how you feel. As an extreme example, in some of the more stringent religious circles I've mixed with, people avoid any unnecessary physical contact with the opposite gender.  (In these religious circles, they tend to erase counterexamples to cisheteronormativity.)  I'm guessing that, for most people here, your boundaries would not be THAT strict, but this means that wherever you set your boundaries, no one has the right to tell you that your boundaries are unreasonable.

2) You don't need to do anything even remotely sexual if you don't want to. Abstinent romances exist.  (The aforementioned religious circles serve as an example here as well.) Whatever boundaries you set, you're likely to eventually find a partner who respects those boundaries long-term.

3) You don't have to do anything you're uncomfortable with. Something that doesn't get explicitly stated enough: "Feeling sexually stimulated/aroused/turned on at a time when you don't want to be" is a form of discomfort and you'd be completely in the right to say "This makes me feel uncomfortable, I'd rather not do that/I think we should stop/I think it was a mistake and don't think we should do that again."

4) If you're anywhere a-spec, presumably you do not subscribe to the model that "the difference between friendship and romance is sexual attraction." I recommend making sure that you and any potential partners agree on the reasons why your relationship goes beyond friendship.

5) When it comes to potential partners who do not respect your boundaries/values or do not share your goals, thinning your dating pool is a good thing, not a bad thing. On its own, having a wider dating pool would be a better, but not at the expense of going on dates with partners who do not respect your boundaries, or partners who are interested in a relationship for a much different reason than you are.

6) Many people will assume that lack of sexual intent means either lack of emotional connection or that you're just not old enough yet. If either or both of those things are not true, make sure that your partner/potential partner knows that those aren't the reasons. (If you're under the age of 25 and people think it's just that you're not old enough yet, they will likely assume that within about 6 months, probably less, your stance would change, and in all likelihood would continue to pressure you.)

7) Identify common manipulation tactics so that you can more easily emotionally distance yourself from the creeps who use them. These tricks include:

• putting you on the spot rather than giving you time to think over what you're comfortable with

• repeatedly asking you for the same sexual favor after you've repeatedly said no

• the dreaded advance-retreat-return manipulation tactic.  (That's where an abuser start's touching a benign, non-erogenous part of xyr partner's body within xyr partner's comfort zone, then moves closer to a more sensitive part of the body before quickly retreating.  This is to make the partner think "okay, I don't need to object, xe realizes that xe went to far.  Xe's so sweet and sensitive," only to touch xyr partner again a few minutes later, leaving the partner thinking "well, it's awkward for me to object now, I didn't object the first time."

Does anyone have anything else to add?