Get plenty of rest, do not overstimulate yourself with too much activity, TV, computer etc. Definately avoid large Supermarkets and Banks - seriously overstimulating environments. No alcohol.

Don't exercise! Walking is fine, but do not push yourself. When you do start after all symptoms have gone, go for no impact sports like swimming and cycling.

Avoid stress, and if it getting too much an antidepressant might be needed. Two years on I am still on low dose of 30mg Cymbalta. Cymbalta really helped my mood, sleep and pain.

If you have post-concussion headaches which include noise and light sensitivity they may well need to be treated as Migraines. Imigran worked well for me. Unfortunately I still have Neuralgia, so I take Lyrica for this.

That is my take on things, good luck!