Just my "short list" of things I want handy when I am cooking outdoors:
1. Tongs like Dee described. Pampered Chef also has a ice set that lock as described in Dee's post. Tho the price is likely more than Oxo. Possibly a sturdy, large spatula as well if cooking fish or other delicate foods.
2. Maverick 732 for long, low and slow cooks
3. Maverick Pro-100 for short term cooks ( like the Thermapen or other digital instant read "momentary use" probe thermometers)
4. Long cuffed, insulated leather or temp. resistant rubber gloves for handling hot stuff
5. Spray mist bottle - full of water for short term high temp cooks ( if cooking over gas or coals - for flare ups) or full of thinned glazing material of choice for ribs, or other as desired.
6. Plates or pans and aluminum foil for foods that come off the grill that need to be kept warm.
Just the basics! There are other cook specific things ( skewers, grill baskets, etc...ck. out the new line from Williams Sonoma
) but these are the things that I generally make sure I have within reach while at the grill.
Best of luck on your new adventure. You are going to have fun!
T