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System integration: a practical guide

October 15, 2025LCR Consulting

"I have to enter this info into the CRM, Excel, and then email it to someone."

If that sounds familiar, you're not doing work. You're a human interface between systems nobody ever connected.

This is expensive. Not just in time, but in errors. When you enter the same thing three times, there are three chances to make a mistake.

Why aren't systems connected?

Usually because: 1. Nobody thought about it when systems were purchased 2. "We'll do it later" - but later never came 3. IT is overloaded and it's not a priority

Result: people fill the gap that machines should fill.

Five most common integrations

1. Web form -> Database + Notification

When someone fills a form on your website, that info should automatically go to: - Database (Notion, Airtable, Google Sheets) - Email to you or the team - Maybe a Slack channel

Doing this manually takes 5 minutes per form. Automatically - 0 seconds.

2. Email -> Tasks

Customer sends email with certain subject line -> automatically creates task in project management (Trello, Asana, Notion). No need to copy manually.

3. Calendar -> Reminders

Meeting in calendar -> automatic Slack reminder 15 min before. Or: new meeting in calendar -> automatic email to participants with prep materials.

4. Invoice -> Accounting

Invoice sent -> copy automatically goes to accountant and archive. No need to forward manually.

5. CRM -> Reporting

New client added to CRM -> sales report updates automatically. No need to manually compile reports.

How to build: step by step

Step 1: Map manual movement

Write down all places where you move info from one system to another manually. Be specific: - "Copy customer name from form to Excel" - "Send invoice to accountant by email" - "Add meeting notes to Notion"

Step 2: Prioritize by frequency

What do you do every day? Once a week? Once a month?

Start with daily ones. That's where the biggest savings are.

Step 3: Choose a tool

NeedToolPrice
Simple flowsZapier~20-50 EUR/month
Complex flowsMake~10-30 EUR/month
Maximum flexibilityn8nFree (self-hosted)

Comparing n8n vs Zapier will help you make a better decision.

Step 4: Build one flow

Don't try everything at once. Build one flow, test it for a week, fix bugs. Then add the next.

Practical example

One of our clients was a small consulting firm. Their workflow before:

  1. Client fills form on website
  2. Info comes as email
  3. Someone copies it to Notion
  4. Someone copies it to Google Sheets
  5. Someone sends confirmation email

Time spent: 10-15 minutes per form. 10 forms per day = 2+ hours.

Workflow after:

  1. Client fills form
  2. Automatically: info to Notion, Google Sheets, and confirmation email

Time spent: 0 minutes. 2+ hours saved daily.

Common mistakes

1. Starting too complex

Don't try to automate the entire company on your first project. Start with one flow. Digitizing a small business shows where you should actually start.

2. Not testing

Before using a flow for real, test it 10-20 times. Find bugs before customers find them.

3. Not documenting

Write down how the flow works. When you leave someday, someone else needs to understand it.

Summary

System integration isn't an IT project. It's a question: where are we spending human time on things machines could do?

Start with what you do manually every day. Automate it. Then move on.