Question for *STRONG/TITLED* Chess Players - How do you make things complicated?

A skill I've been thinking about developing lately is being able to find interesting, creative ways to complicate equal, balanced positions, and especially create some tactical opportunities, and sharpen the position up basically. 

I know that this is an important skill at the master level - steer the game into a direction where big mistakes will easily happen, especially for players who don't just blunder without warning. 

I know that there are some basic things you can do to keep a position "tricky":

*Make a positional sacrifice

*Avoid trades

But I'm still confused as to how titled players can get such "creativity" in their games. Part of it must be experience, but I was wondering: Are there any overarching principles and tips that you use to complicate things?

If you've ever played against a lot of intermediate/weaker players, and then a titled player or two, you probably know what I'm talking about.

Here is one example:

This was taken from a finished daily game I played. As black to play, how would you try to win this position against a player rated say, 200-300 points less than you (just some rough numbers - basically, you need to win against a weaker player), supposing you had to win?

In the actual game, all queenside pawns were traded off...

I'm really sick and tired of getting drawish positions against weaker opponents by playing moves that may or may not be theoretically best boardwise, but are essentially "blunders" when it comes to giving me chances to win.