I assume this person has read the Sabbasava Sutta, if not it is important to read it, because the Buddha actually does list a lot of different ways of letting go of anxieties and troubles in most of the categories.
Insight: by developing Wisdom we are able to let go of our ignorance. It is pretty obvious. Wisdom development is where we want to go so that we can stop our desires, which create our Dukkha and so on. The Four Noble Truths are the key. The fourth Noble Truth is the path leading to that wisdom development. All the techniques you are doing will give you insight hopefully and you are able to let go of your troubles that way.
Restraint: sometimes you have to guard against doing something. For those of you who have quit alcohol and drugs, you have to restrain yourselves when you are going to see friends who are going to indulge themselves in alcohol and drugs. You have to guard against going in a bar or disco, because you may get influenced again to get it. So restraint is where you make sure that you guard against getting involved in ways that you know you don't want to get involved in.
Use: in classic form, traditional Buddhist Monks have four things that they use. They have food, they have clothing, they have shelter and they have medicine. To use them wisely is what the Buddha wants you to do. So as to your clothing, use it wisely. You don't need 72 pairs of shoes. All those extravagant things that people buy and do isn't necessary. Use your food wisely. Don't just overeat and become obese, etc. Use your medicines wisely, don't get into drugs, don't use the prescription stuff more than you need to get rid of your illness and so on. So use is to end our difficulties, if we use things wisely.
Endurance: Unpleasant Physical Sensation technique. How well can you sit with that unpleasant physical sensation? How well can you endure a mosquito on your arm? How well can you endure the heat in the middle of the day? These are ways to find more inner peace, through endurance. Develop the ability to endure something that is uncomfortable, not fighting against it, not having aversion towards it.
Avoidance: is a little bit like restraint. In the way that I described restraint it is probably more appropriate for avoidance, but restraint would be guarding your sense doors. Now these two go together, it is very hard to say they are totally separate, because when you say you restrain your eye contact, it could mean you make sure that you don't go into that bar to see your friends who are drinking beer. So you are avoiding the bar and you are restraining your eye contact. So restraining and avoidance go closely together. If I recall rightly in the Sutta, restraint was about restraining the sense doors, but avoidance was avoiding the places you shouldn't go to. Quite frankly they have to go together.
Dispersal: dispersal is letting go, letting go of your anger. You walk into the meditation hall up there and you are going to find regularly in this type of retreat you can't always get your favorite sitting spot. If you find yourself getting a little upset, "That is silly, it is not my spot, it doesn't matter. When I shut my eyes it doesn't matter whether I am in the front on the left side, the right side, behind, what does it matter when I shut my eyes?" So let go of your aversion as quickly as you can. Regarding your food, you watch somebody taking 4 pieces of pineapple in the morning. You get really upset. "Oh, poor person," you start to have compassion for that poor person who is greedy today. Let go of your aversion through wisdom in that way, dispersal is letting go of things.
Development: is specific to the Seven Factors of Enlightenment. Develop these and you are going to help lessen your problems and difficulties.
So that is a brief overview and if anyone is interested, it is very helpful to read the Sabbasava Sutta, it is a very in-depth Sutta. It has much more detail than almost any other Sutta out there, except maybe the Satipattana Sutta. The Sabbasava Sutta is a very good Sutta.