Sublime has a ton of built-in shortcuts that will save you time when programming.
Here are a few that I find I use all the time:
cmd + ← OR → go to beginning or end of line from cursors current location, combine with shift to highlight the whole line.
option/alt + ← OR → jump by word instead of character.
option/alt + click and drag box style highlighting, also an easy way to create many cursors.
cmd + d find next instance of highlighted word, easily replace key words!
cmd + p quick open file, just start typing the name of the file.
cmd + shift + V paste and indent correctly.
cmd + y redo, opposite of undo.
cmd + x delete line.
cmd + ctrl + ↑ OR ↓ bubble line up or down.
cmd + / comment or uncomment selected text/line.
cmd + [ or ] indent or un-indent line or selected lines.
cmd + shift + p open command prompt.