[Shana]

Some tips from me is fix one problem AT A TIME then only move on to fix the 2nd problem.

For example from what you have described you have low probe count and supply block, that is 2 problems. So lets fix the low probe count 1st, because this is the base of all basics to have a very stable and good economy to get the units you want later in the game.
* Hot key your Nexus to 3 & 6 (or 4 & 6)
* Hit your hot key and click "E" to build a probe, you will notice that your fingers don't move far from the 2 hot keys and its easier for you to remember to build them
* Keep building probes till you have 28~30 probes (double click on one probe to select all probes on the screen that you are seeing at the moment)
* Each base should have 24 probes (on minerals) + 6 (on gas) = 30 probes per base to have best efficiency
* Practice until you don't need to keep reminding yourself to build probes

Once you have no problem building probes, then lets focus on not supply blocking yourself. This will require your eyes to roll to the top right off & on. Here is some tips on how to not supply block yourself:-
* Always take a peek at the top right corner AFTER you've build a unit, as this makes it easy for you to know whether you are nearing your max supply or not
* The next question you might face is how far supply should I stay ahead? You won't want to have 10/100 supply when you know you can't make tons of units in next 10 secs. Tips is if you are able to build 10 supply of units (4 stalkers I think), then most probably you need 2 pylons (1 pylon is 8 supply) with some extra supply to get some probes at the mean time too.
* Also do this until 2nd nature!

Hope what I type was simple enof for you to understand ^-^ . After fixing that 2 problem, most probably you'll need to learn some timings when to get more probes and attacking units and build orders. Till then, good luck have fun!!!

Quick Comments

	breadfan:	I would suggest reversing the order, since supply blocking yourself constantly = less probes.
	Ruski:	Nice advice thanks