If possible, make a note of the time and place of the accident, the other parties involved, and the names and addresses of any witnesses.
Do not admit liability even though you may think you were partly to blame. Do not, yourself, offer to accept or pay any damages.
There is a time limit for bringing claims which is usually three years.
You must prove someone is at fault unless you are injured by a defective product. It is important to interview all witnesses and obtain documentary evidence as soon as possible.
You need a careful record of all your losses and expenses. Your future losses have to be predicted. You may be entitled to more money than you think.