SIMPLE MONITORING TESTS
Find a triathlon swim coach who can provide video stroke analysis. Use this to identify the aspects of your technique that can be improved and ask for advice on specific sessions to work on them.
T10 or T20 Test
With a friend recording your 100m splits, swim as far as you can in 10mins (beginner) or 20mins (experienced). Aim to even pace or negative split the swim. Use the result to review your pacing.
Count vs Rate
Count the number of strokes you take per 25m at a given swim speed, then see if you can reduce that count while holding pace. Then hold your count and up your stroke rate to increase speed.