Regarding online, there Korte Trouwjurk are two obvious opportunities for this. The chat box and/or showing your hand. To a lesser extent IMO, your actual image (picture) if your preferred software provides that option.
As for live play, there are a few things to consider, mainly:
Some, of course, are more important than others. What I'd like to know is, not necessarily when or who to look tight or loose against (that's a strategy question/discussion of it's own) but,
What are the things you find the most effective at promoting a particular image of your playing style?,
In my opinion, it depends on what stakes you are playing. At low stakes, none of these matter whether live (1/2, 1/3) or online (upto 1/2). There are recreational players willing to take chance and gamble with their low stacks and when-ever they think Lange Cocktailjurken the pot is huge to gamble. So its better to have something when you raise. It's like playing roulette for 200-300.
Also for Live play, it depends whether you are a regular or a recreational player. If the dealer knows you, its a sign of your known-presence and that does nothing to change the perceptions that you have suggested. Also, if you have played before at the same casino, players will enquire with others and find out your strategy. That has more bearing to any of the things you have suggested. Most of the poker players dress like homeless so whether you come in Formal or not it doesn't really matter - they are always waiting for that chance to trap you. Too much talking and too much betting will induce players with good hands -weak flops for them to call the raise on flop (if you hit a set or higher). This works well at low Trouwjurk Lange Mouw stakes. But even then these strategies only work for the first half-an-hour or so and by then everyone knows your play.
Lose play then and then and if the pot is low (for you) you should gamble with weak hands to tell others you are there to gamble is a good strategy that works. Tilting after losing a big pot (ofcourse only when you have strong hands or nuts or you fold) is the another way to extract money.