1. Cook everything you can, not only does it remove the rads it also gives you some cheeky experience points
2. Before doing any modding or cooking rest in a bed for 1 hour, as that gives you an experience boost for a bit.
3. Resting in a bed yields extra experience boost for a bit of time and only 1 hours rest is needed.
3. A critical is a guaranteed hit even if the chance in VATS is 1%, the only thing that stops a hit is if an object is in the way.
4. Lone wanderer perk works with your dog.
5. Try to only use the most common bullets (ie .38 and .45) for general wasteland use. Save your shotgun etc for critical moments.
6. Head shots. Even if you have to get a bit nearer always try for them.