This basic tutorial covers tools options are
1 - Rectangle tool
2 - 3Point Rectangle tool
3 - Pick tool
4 - Free hand pick tool
5 - Free Transform tool
6 - Twirl tool
7 - Attract tool
8 - Repel tool
9 - Smear tool
10 - Smudge tool
11 - Roughen tool
12 - Smooth tool
13 - Shape tool.