Don't let the adjuster sit on your claim. Put everything agreed upon in a confirming letter, and when that date rolls around call and politely demand a response. If you have asked for information, or for a new settlement offer, set a reasonable deadline by which you would like the response. Don't pester an adjuster by calling every day, but make sure the adjuster knows you are out there and that you will be regularly and thoroughly following up on your claim. Be calm and straightforward.
Insurance adjusters are overworked and underpaid, and they hear a lot of stories every day.
They are also human, which means they don't respond well to abuse or to hysterics, but do respond well if they believe what you say. Your job is simply to show the adjuster that you know how the process works and that your claim is an honest one. Let the adjuster know you believe in the facts you have presented, and avoid high emotions. If you show the adjuster you are making a good faith claim, you will likely get a good faith settlement offer in return. Evaluate how much your claim is worth, bargain with insurance companies and obtain a full and fair settlement with this plain-English guide.