Not like patterns, stuff like magic tricks, or finger tricks like pen spinning and zippo lighter tricks?

There is a very neat trick where you take a scrambled Rubik's Cube, do a few turns. When it's still visibly scrambled you throw it in the air and suddenly it's solved.
It doesn't take any special equipment but you do need to prepare the cube beforehand.

Any idea how it's done?

Yes. But a magician wouldn't reveal his secret now, would he?

I won't post it on here because some people don't want spoilers but you can easily find the method using Google.

Another very neat trick is showing someone two Rubik's cubes that are scrambled differently, and asking them to scramble the cubes further, using as many moves as they wish, and without showing you what they are doing. The only condition is that they perform the same sequence of moves on both cubes, so if they turn the face with the white center sticker 90 degrees clockwise on one of the cubes, they must also turn the (differently looking) face with the white center sticker on the other cube 90 degrees clockwise and so on. When they are done, they may hand you any of the two scrambled cubes, and you'll quickly make it look exactly the same as the other scrambled cube without even seeing that cube. You may also do this blindfolded while pretending that you are reading their mind... I find this to be pure mathemagics at its best...

Also, you could always try to combine cubing with other activities such as juggling or slacklining ...

Spoiler alert! A hint to the trick with the two cubes that I mentioned above can be highlighted below.

Hint: The two scrambled cubes you start out with should only differ by a sequence S of moves which has the special property that it commutes with every other sequence of moves performed on the cube (in mathematical terms, we would say that S belongs to the center of the cube group), and the sequence is also its own inverse. So SQ=QS for every sequence Q, and SS=id. Hence, if we start with two cubes which have been scrambled by sequences P and PS respectively, and the other person performs a sequence Q on both cubes, then the cubes are now scrambled by PQ and PSQ respectively. Now, performing S on either of these cubes will restore it to the same position as the other cube: Either you perform S on the PQ scrambled cube and get PQS=PSQ (this is where the commutative property of S comes to use), or you perform S on the PSQ scrambled cube and get PSQS=PSSQ=PQ (again the commutative property of S is essential, and we also use that S is its own inverse).

Now, all you need to do is to find such a sequence S (there is a well-known sequence which would work) and practise performing it blindfolded...

You can do cube spinning. Like pen spinning with a 1x2x5

Videos please - I would like to see some of these tricks!

Here's one I like from our own David Calvo:

http://www.youtube.com/watch?v=lhkzgjOKeLs

I'm sure you were joking but I'm already ridiculously into pen spinning and I just want tricks I can do with the 3x3 because I literally always have one on my person but I don't have my RSVP MX on me as often. It's much easier for me to misplace.

Well I sometimes do this "impressive" finger trigger trick. don't know if it counts to you but you can do three moves on a cube: R U' R. When you undo those three moves you do the U move with your index finger and just have the R side in your right hand all the time. If the cube is loose enough and you have enough practise, which you won't need a lot, you take the cube and just go *SNAP* and its solved. If you take the right hand away right after those three moves and quickly put the cube on the flat left hand it will look pretty sick to people who aren't familiar with cubing.
It's just one pretty loud cracking sound and it lies solved.
Oh yeah, and if you're left handed and like to do it better the other way just mirror the sequence

Regarding the trick Tom mentioned, I believe it is the one shown in this video. And the trick with the two differently scrambled cubes can be viewed here.