Depending on whether you are a professional or a DIY "Do-It Yourself" tradesperson will depend on what type of tools you purchase.  Some of the key points to consider are 

• Durability-It is preferred to buy the best.  It is not always this easy.  For example,  I work on a lot of things out of my garage.  I do make it a point of buying American Made or at least high quality tools.  There are times when I know I am only going to use the tool for a short time, then I will factor price into my decision.  For example a tile saw.  A professional will most likely buy a very high quality tool, because it will be used day in and day out versus only using the tool for a small job like tiling bathroom.
• Precision-Skill with the tools is a factor to consider.  Just because you have professional tools doesn't make you a professional.  There are tool brand that are very precise and if I were working with these tools everyday, I would purchase the best.
• Strength look for tools that are drop forged rather than cast.  Casting traps impurities and air during the process thus creating weak points.  Generally speaking if a tool is drop forged and machine finished the manufacturer will leave it unpainted.
• Feel-some tools are simply better designed to fit you.  Try out multiple tools before you purchase them to make sure it fits your needs properly.
• Price-This can be an indicator of a high quality tool, often times there is a reason for the tool to be more expensive.  It is meant to be used everyday vs. a tool that will be used sparingly.  

Saws
Drills and drivers
Cutters
Hammers
Wrenches
Pliers
Scapers
Prying tools
Power saws
Drills
Cutters Sanders