What practices can aid (or not ruin) the mahasi style meditation?

You want many things whereas You can recall that the whole point of the endeavour is to establish firmly the equanimity and the benevolence, towards your self and others (in phrasing the goal in terms of exterior of the the self and interior of the self). You also do not state what you accomplished nor what is blocking. Here is a little compilation of links to practice http://pastebin.com/m4vS0KMg

I had the same issue and this is the advice i got from a monk...

What we call meditating is not something that must be done while sitting down,you can meditate in many other positions.

For example other than Breathing meditation you can actually do any other Buddhist meditation without having to sit down.

Here are some examples.If you do not know these meditation click on it and it will open a web page for you to learn.All these meditations can be done without staying still so you will have all the time you need to meditate.

Impermanent Meditation 1 - lesson

Impermanent Meditation 2 - lesson

Loving Kindness Meditation - lesson

Practice these meditations while doing your day to day stuff and before you know it you will be a good practitioner,This is how i got over the issue my self.

May triple gems bless you!

What have you experienced that has given you confidence? Hopefully you will have some seed of confidence that you can cultivate through reflecting & chanting the reflections. Then there is no need for distracting yourself with a whole other technique.

The easiest thing to do to aid in your practice is to stop being so scattered! Pick one technique and stick to it. That you're all over the place exploring other systems and looking for results indicates to me that you are having a hard time staying focused on the cushion. Trust, trust, trust in the process! It's the only way you are going to make any progress.

Theravada Buddhist answer, based in the tradition of Ven. Mahasi Sayadaw.

In the tradition of Ven. Mahasi Sayadaw, we observe and note everything that comes up, i.e. all mental and physical phenomena.

Now, you have pointed out your own hindrance and blockage right here: "Wanting to get results, seeing images or strange stuff".

That is your road block. Unless you resolve this matter, it will continue to be a hindrance on your path. Sometimes a meditator may meet a hindrance, that is not immediately visible, so its very good that you know what blocks you.

Then what to do?

As a Mahasi-practitioner, one should note the phenomena of wanting as "wanting, wanting". It could perhaps also fall under the 5th hindrance, Doubt. Here the solution would be to also note the doubt as "doubting, doubting", and to go freshen up on your theory, i.e. the method of practice. A skilled meditator knows the theory that he or she practices. Theory and practice has to go hand in hand. One has to know what to do when hindrances arise, which they will sooner or later for all meditators. When one knows how to deal with them like the inside of ones own pocket, then one can use them to cultivate insights and thereby progress on the path.

For reading material, I would suggest the book How To Meditate: A Beginner's Guide to Peace, by Ven. Yuttadhammo. It covers all one needs to know regarding the burmese method.

Wanting to get results is one of the greatest pitfalls on the path. Wanting something will ironically stir one further away from getting what one wants. By for example wanting to win Nibbana, one is actually moving further away from that goal, because the wanting itself becomes a road block on the path.

It might also be beneficial for you to read up on the 10 paramitas, namely the 8th paramita, i.e. the Adhitthana-paramita. Adhitthana means "Determination or Resolution". It can be cultivated in the meditation practice, e.g. by choosing to meditate for one hour and not moving at all. This is just an example. There are many other ways to cultivate this paramita.

Its very useful in the training of the mind, so that it will stray less. When the Buddha attained his enlightenment, Mara sent his beautiful daughters to the Buddha to tempt him and he sent an army of demons towards the Buddha but he did not move at all. That is an example of Addhitthana.

What practices can aid (or not ruin) the mahasi style meditation?

Regarding the augmentation of your practice, the burmese method is complete in itself. Wanting to augment the practice, should again be noted as "wanting, wanting".

Mixing methods is called "Eclecticism" and its not recommended. Try to stay with one method of practice and if that does not work out, then choose another method of practice. Mixing methods will not give good results since methods are often not designed to be mixed. This will result in one having a halfway house and not a final vehicle.

If you have any questions to what I wrote, let me know. May you have a fruitful practice.